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Nank Runner Diver2 Pro: One Minute Review

The Nank Runner Diver2 Pro are unquestionably one of the best pair of bone conduction headphones on the market, and certainly the best pair of waterproof headphones I’ve personally tried in a very long time. They perform well in all areas, offering long-lasting battery life and ample storage, and prove comfortable to wear both on land and in water.

I used the headphones on my runs for quite a few weeks and could find precious little to moan about. Their adjustable hooks allow you to achieve supreme comfort, and you can also adjust the transducers – bend them inwards towards your ear, for example, to activate the Runner Diver2 Pro’s “noise canceling” mode – to suit your needs. Note, though, that noise canceling here isn’t exactly on a par with the ANC you’ll find on the Apple AirPods 2 Pro; you’ll need to wear earplugs to really eliminate sound leakage.

Nevertheless, to expect a pair of bone conduction headphones to feature world-class noise canceling is likely an ask too much. The Diver2 Pro are open-ear headphones that have been designed to enable you to continue to hear the world around you, stay safe on the roads and perform well in water. By their nature, bone conduction headphones don’t shut sound away, which explains the reason that the noise canceling mode disappoints here.

Bone conduction headphones work by using transducers to emit sound waves through your temples towards your eardrums, rather than directly into your ear canals. And coupled with the proprietary magnetic charger, silicone casing and 32GB storage in the Diver2 Pro, allow them to be used in the water, too. Bluetooth signals don’t travel well underwater, so the onboard storage is crucial for swimmers.

Overall, the Nank Runner Diver2 Pro are genuinely well-crafted and well-executed headphones for all manner of sports, from running to swimming. They’re a bit thicker and bulkier than market leader Shokz’ slender offerings, probably in order to accommodate that MP3 player – but we really can’t fault that; the headphones are quick to charge, simple to use and high-performing; they’re great for runners, cyclists and swimmers alike, which will make them near-perfect for triathletes.

Nank Runner Diver2 Pro: Price & Availability

• $199.99 / £154.50 / AU$427.80
• More expensive than OpenRun Pro 2
• Can be found on sale for less

The base price of the Nank Runner Diver2 Pro is $199.99 / £154.50 / AU$427.80. For that sum you get the headphones, the proprietary magnetic charging cable, earplugs, and three sizes of sound-quality enhancers. A carry case is available, but it’s sold separately - which is disappointing considering the price

While the base price is more expensive than the Shokz OpenRun Pro 2, putting the Diver2 Pro at the very top end of bone conduction models, the headphones can frequently be found at a discounted price on both Nank’s own website and third-party outlets such as Amazon. At the time of writing, Nank’s website has the US version of the Diver2 Pro on sale for $159.99, and the UK version for £123.60.

Find them on sale for less, and I’d consider the Diver2 Pro a good buy – especially at that UK price point.

• Value score: 3.5/5

Nank Runner Diver2 Pro: Design

(Image credit: Future)

Weighing around 32g, the Nank Runner Diver2 Pro headphones are light and comfortable both in and out of the water, which is surprising given they come packing 32GB storage. Their silicon casing is remarkably soft, especially on the enclosed earplugs, which are made from the same material. The IP69-rated sealed unit makes the Diver2 Pro headphones fully waterproof and sweatproof; even open-water swimmers can use them without worry of saltwater getting into cracks and crevices.

The magnetic proprietary charger is well designed and clips onto the inside of the unit neatly; however, given the price, I was surprised to see Nank still using USB-A for its charging point. I reckon if we’re expected to pay full-price for these headphones, then USB-C – rapidly becoming the new universal standard due to its faster data transfer and charging speeds – should have been used instead.

The headphone’s arms allow you to pull the transistors towards your ears by up to 35 degrees, delivering greater control over how much sound is heard, while a trio of buttons enable you to skip tracks, adjust volume, and switch between Bluetooth and TF (storage) modes. Patented technology aims to reduce vibrations in the unit – a common problem with bone conduction headsets – by up to 35%. You can also slip the included silicon sound-quality enhancers over the base units, to stick in your ears, to ensure sound is conducted more effectively.

Overall, the Diver2 Pro’s are extremely well-designed: light, durable, comfortable and eminently functional.

• Design score: 5/5

Nank Runner Diver2 Pro: Features

• Noise canceling mode
• Multipoint connections
• Masses of storage

The adjustable arms of the headphones operate the noise canceling mode that Nank advertises: it claims that by pressing sound units closer to the ears and adding ‘noise canceling waves’ that you have the option between open-ear and closed-ear. You can slip the included silicon sound quality enhancers over the base unit, to stick in your ears and ensure sound is conducted more effectively.

However, the real stars of the show here are the multipoint connection with Bluetooth 5.4, which allows you up to two high-quality connections at once to switch between freely, and the built-in storage. The 32GB offered here is generous, holding up to 8,000 tracks – enough for hours upon hours of podcasts, or the longest workout playlist anyone has ever (probably) compiled. You can adjust the volume up and down, switch between modes or skip tracks with the Diver Pro2’s simple button configuration. While this might appear a limited feature set, in terms of bone conduction headphones, the Diver2 Pro are practically feature-rich.

I can’t really think of anything else I’d want on the Runner Diver2 Pro, apart from the ability to isolate the stored music into specific playlists, as I can do on Spotify. However, I can’t imagine how Nank would go about implementing such capability. These headphones are effectively a high-capacity iPod Shuffle at a fraction of the size, built into a pair of headphones. Awesome.

• Features score: 4/5

Nank Runner Diver2 Pro: Performance

(Image credit: Future)

• Great performance and comfort during runs
• Works well in the pool
• Battery lasts ages

I used the Diver2 Pro for multiple runs of varying length in Bluetooth mode, and found them ridiculously easy to set up and simple to use. My one gripe was that I was expecting the volume up/track forward button to be on the front of the unit rather than the rear, which took some getting used to.

Aside from that minor gripe, the headphones were light, comfortable and a pleasure to run with. While I didn’t find the noise canceling mode particularly useful – there was still plenty of ambient noise leakage, and the music just got louder rather than clearer – but this is a small complaint. From the start, the sound was clear, nicely balanced rather than overly-bassy (which is common with bone conduction headphones), plus the headset worked well for taking calls on the go, cutting out some ambient wind noise at my end.

In the pool, I found the Diver2 Pro similarly useful. Loading the built-in MP3 player with music was super simple from a laptop, and switching to storage (or “TF mode”) from Bluetooth was simply a matter of pressing the power button three times in quick succession. Despite an unavoidable change in sound levels as my head rose and fell out of the water during a swim, I could hear my music clearly throughout my swim.

Battery-wise, the headphones performed as described, lasting for around 12 days with plenty of use before needing to recharge. On the occasion I did find the battery low, charging for 10 minutes delivered an extra hour of use.

• Performance score: 5/5

Scorecard Nank Runner Diver2 Pro: Should I buy?

(Image credit: Future) Buy it if...

You’re a triathlete

Find yourself moving from the water to the land during your workouts? These are the headphones to buy.

You need built-in storage

With a whopping 32GB, you need never take your phone out on a run or cycle again.

Money’s no object

These are a premium set of headphones, with a price to match.View Deal

Don't buy it if...

You’re on a budget

There are cheaper headphones out there that do the job, albeit not with the same quality nor flare.

You need actual noise cancelers

If you’re looking for headphones that will block out the noise of the gym, you’ll need a pair that actually block your ear canal.

Also consider

Shokz OpenSwim Pro

The market leader in swimming headphones.

Read our full review

Shokz OpenRun Pro 2

We called the OpenRun Pro 2 our ‘ideal runner’s headphones’.

Read our full review

How I tested

I spent weeks testing the Nank Runner Diver2 Pro, going on runs and one pool swim. I drained the battery down with frequent use, charged it again, tried all the modes and loaded songs onto the unit using the proprietary cable.

First reviewed: March/April 2025

Earfun OpenJump: Two minute review

Now that open-ear headphones have evolved from a simple fad to a fully-fledged new kind of headphone (and a hugely competitive one, at that), two rough groups are emerging. On one hand you've got the open-ears designed for fitness use, offering long battery lives and hardy builds so you can run and cycle around traffic; on the other you've got lifestyle open-ears that provide decent music and some useful additional features.

The new Earfun OpenJump seem to want to straddle that divide, landing loosely in the second camp, but offering features which will appeal to the first. Unfortunately, poor timing has hampered what could have been a warm reception.

I associate Earfun with making cheap and cheerful audio tech, but the new OpenJump cost roughly the same as, and came out at the same time as, the Huawei FreeArc. These rival buds trump the Earfuns in myriad ways, with another contemporary (the Honor Earbuds Open) also eclipsing the OpenJump. So it's hard to recommend Earfun's proposition given that you can easily buy those alternatives – and I think, depending on your priorities, you should (although that's a different piece, isn't it? This is about Earfun).

But forgetting its rivals for a second, how do the Earfun OpenJump hold up? Well, they're... decent, but I don't think they'll be remembered for ushering in the new age of open earbuds as much as their H-branded rivals.

The buds are fairly lightweight and comfortable to wear, though some design issues made the fit and gesture controls a little unreliable. There's a decent feature set, particularly with a long-lasting battery life and an in-depth equalizer, and this is almost certainly where the OpenJump stands out.

Unfortunately, the audio quality just isn't there, and I mean that despite some bass tech from Earfun plus the aforementioned equalization options. Until very recently, you couldn't expect top-notch audio from such a design. But times have changed, and although the OpenJump are decent, that isn't quite good enough any more, even for this money.

Something to bear in mind: already in my testing period, Earfun has reduced the OpenJump by a noticeable margin. So there's a good chance that you can find these buds for a significant discount over the price listed below, firmly placing these into cheap earbuds territory. If that's the case, you can ignore a healthy chunk of my criticism here, since you'll be picking up a useful bargain. But at retail price, perhaps it's worth waiting for these to come down.

I really didn't mind using the OpenJump through the testing period, and I see myself continuing to use them until my next pair of open-ears come in. Nothing about them offends or annoys, but also, nothing delights or wows. And in the end, a tech review is meant to be an appraisal of which option is most worthy of your hard-earned cash. It's just too hard to point to the OpenJump as being that, given the competitive state of the market right now.

Earfun OpenJump review: Specifications Earfun OpenJump review: Price and availability

(Image credit: Future)

• Announced in February 2025
• Costs $79.99 / £99.99 / AU$149.99
• Price is variable

The Earfun OpenJump was announced and released in February 2025, ready for everyone who put ‘exercise more’ on their list of New Year’s Resolutions (but didn’t start straight away, for whatever reason).

You can buy the earbuds for $79.99 / £99.99 / AU$149.99 – Earfun’s website has them listed as costing more in certain regions (£129.99 in the UK, for example), and the prices I’m going by are the RRP on Amazon.

In an odd break from Earfun’s modus operandi, that means that these are priced in the mid-range of the open earbuds market, not at the super-cheap cutting edge of it. At that price they’re the same price as the Huawei FreeArc, and there are a fair few open-ear options on Amazon for less – though don’t expect reliability and quality if you don't pay for it.

It’s worth noting that, unlike competitors, Earfun’s open-ear buds are already subject to price cuts and discounts. I found them at $20 off in the US and £40 off in the UK, just one month after their release. So it seems money-saving deals come thick and fast on these buds, however it wouldn't be fair for me to treat these prices as the default, since you may not be so lucky.

Earfun OpenJump review: Design

(Image credit: Future)

• Cheap-feeling plastic charging case
• IPX7-protected buds
• Slightly unreliable fit and gestures

From a distance, the Earfun OpenJump’s case looks like most other open-ear buds’: a medium-sized clamshell. And that’s certainly true, but when you get up close and get the thing in your hand, you realise how cheap the plastic material feels. It didn’t feel very robust either, and I’d be curious to see how durable the case is over a longer amount of time. Even over a relatively short testing time of two weeks, it picked up a few scratches.

Of course, the case is simply for holding and charging the buds. It does that, with a USB-C port for powering up and an indicator LED on the front. On to the buds themselves then, and these look how you'd expect for open-ear designs: they have a bud which is held just over your ear by a sport loop, with a counterweight (and a very little battery pack) tucked behind your ear.

Evidence of how easily-bendable the hook is. (Image credit: Future)

They mostly fit well, and I went on several runs and workouts without issue, but now and then there was slight wobble and which made me worry that they'd fly off at any moment. This was nowhere near as bad as with some other rivals I've tested, mind you, but I've also used other buds without issue.

The buds have an IPX7 rating, meaning that they're protected from immersion in water up to a depth of a meter for up to thirty minutes. Given that the new athletically-minded Beats Powerbeats Pro 2 (although these are in-ear, rather than open-ear) only list a splash-proof IPX4 rating, it's good to see that the Earfuns will handle a puddle drop and survive.

Both buds support gesture controls by tapping once, twice, thrice or tapping and holding. They picked up my taps reliably, but the angle of the sensor meant I kept whacking my ear antihelix when trying to tap them. In a telling move, I soon relied on my phone or smartwatch for music control instead of these sensors.

Unlike some rivals, there's only one color option for the Earfun OpenJump: black. They weigh 8g each so they're pretty light, and they never felt a burden to wear.

• Design score: 3.5/5

Earfun OpenJump review: Features

(Image credit: Future)

• Pairing issues
• Versatile EQ
• Long-lasting battery

I had some troubles during my initial pairing with the Earfun OpenJump, in which my phone wouldn't find the buds it'd paired to, and throughout the testing process the Earfun App listed a profile for phantom OpenJumps which were simply a leftover from the first time I had tried to connect. After a while I got them to connect, and didn't have problems after that, but it's worth bearing in mind. I test earbuds constantly, and I rarely have these issues.

Talking of the Earfun app: it's worth downloading, because it brings a plethora of extras. These include various modes for gaming or streaming movies, the ability to customize touch controls and, most importantly, an equalizer.

(Image credit: Future)

Earfun fans will know that the company offers a fairly robust (possibly to a fault) equalizer. There are countless presets to pick from plus a 10-band equalizer and also a listening test to provide a custom sound profile.

A slight issue with the latter is that, like most other companies' versions, it requires you to listen to a sound until it fades from your hearing... all well and good except that these are open-ears. So by their very design, it's especially hard to tell when audio is soft, or when the sounds of the world are simply creeping in (unless you own a hermetically sealed subterranean bunker in which to conduct these tests).

The OpenJumps have some of the best battery life of any open earbuds that weren't made by OpenRock. The buds themselves will last for 11 hours according to Earfun, and my testing backed that up. The case itself offers a total of 42 hours of listening time before it needs to be charged and if anything, I'd say that my actual listening time seemed to surpass that slightly, up to nearly 44 hours, meaning stamina is one area where these buds are genuinely competitive.

• Features score: 4/5

Earfun OpenJump review: Sound performance

(Image credit: Future)

• 14.2mm driver
• Music is slightly lacking in energy and detail
• Bass redemption tech

The Earfun OpenJump came out at a poor time, released simultaneously alongside the two best-sounding open-ear headphones I've ever used (more on that in the Competition section later), so it was always going to struggle in the sound department. And they certainly do, though not to the extent I was expecting.

That's not a huge surprise given that the open-ear form factor naturally means that the drivers are hanging over your ears with no seal. This form factor still isn't for audiophiles and the OpenJump don't change that.

You're getting a fairly forward sound profile with the OpenJump, but music lacks energy or detail. There's little separation between instruments or any expanse to the soundstage, and it doesn't help that the treble lacks sparkle in a congested, compressed-sounding mix.

(Image credit: Future)

I had hoped that the Theater mode, which is meant to improve the soundstage, would help. While it did seem to spread out the music a little more, it also sadly made the overall performance quite tinny.

Earfun has added a feature which it's cryptically calling 'BassSurge Bass' (I wonder what that does?) and this goes some way into providing a little kick in certain songs, but it's hardly a surge of juicy and impactful low-end frequencies. You could argue that bass-heads should still look for over- or in-ears rather than an open-fit design, but other rivals have managed to deliver better bass, despite the inherent shortfalls of a design that doesn't fully cover or go into your ear canal.

The other bit of tech of note is a 14.2mm driver, which is a fairly standard piece of tech for this kind of bud, and I remember the Nothing Ear (open) had the same.

The OpenJump have quite a lot of noise bleed – again an inevitable part of open-ears given the design, but it was a little more pronounced here than on some other buds I've tested.

• Sound performance score: 3/5

Earfun OpenJump review: Value

(Image credit: Future)

I'm going to use the Amazon price to judge the Earfun OpenJump's value rating, because it seems that the buds are readily accessibly at that lower cost.

These are reasonably affordable open-ears for this price, undercutting some more expensive rivals though not quite offering the refined design, or sonic prowess.

They're certainly not alone at this price point though...

• Value score: 4/5

Earfun OpenJump review: scorecard Earfun OpenJump: Should you buy them?

(Image credit: Future) Buy them if...

You like using an equalizer

Compared to other open-ear rivals, the Earfun OpenJump have one of the best equalizers I've used with lots of options for sound customization.

You prioritise a long-lasting battery

The OpenJump outlast many competitors with their 11-hour listening time, and that's equally true with how much extra power the case offers.

You're on a budget

While not the cheapest open-ears out there, the Earfuns still offer you great value for money, especially if you find them discounted.

Don't buy them if...

You're picky about fit

For many users, anything but the most solid fit for open-ears isn't enough, and these users won't like the OpenJump.

You need best-quality audio

This brand tends to offer decent audio and a great feature-set, and although the feature set is still good here, the audio was a little disappointing.

Also consider

Huawei FreeArc

For the same price as the OpenJump you can buy these buds which sound great, have a sturdy fit and come in a more premium-feeling case. They struggle compared to the OpenJump in the battery life department and the app is a chore to download, but overall, I prefer the Huawei option.

Read our full Huawei FreeArc review

Honor Open Earbuds

These slightly-pricier models have an incredibly slim carry case, a design that's most similar to the Earfuns, and a very good audio offering. Again, the battery life doesn't match up, but for sound and secure fit, Honor wins the race.

Read our full Honor Open Earbuds review

How I tested

I tested the Earfun OpenJump for two weeks prior to writing this review, and before them I'd tested two similarly-priced contemporaries: the Honor Earbuds Open and the Huawei FreeArc.

I used the earbuds paired to my Realme phone for listening to music and podcasts, and the testing took place when I was at home, at the office, cycling through the city, going on runs and working out at the gym.

I've been reviewing gadgets for TechRadar since early 2019 and have used a huge range of tech. This includes other open-ear buds as well as audio offerings from Earfun.

Read more about how we test

• First reviewed: April 2025

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The Trump administration has spared iPhones, laptops and other electronics from its reciprocal tariffs, but it's unclear if that'll last.

Discover the fortune and secrets of Tau Ceti IV in new gameplay footage.

• Certain electronics gadgets are now exempt from certain tariffs
• Phones, laptops, and processors all get a reprieve – which includes China
• It's still not clear what will happen next with electronics pricing

There's a new twist in the US tariff trade war: Phones, computers, semiconductors and various other electronics are now exempt from punishing import tariffs, which have shot up to 145% for China and are typically now 10% as a baseline for other countries.

The news was reported by the Associated Press and others, and while it's still early to say what the full impact will be, it does ease the pressure on companies who mostly manufacture their gadgets outside of the US – including Apple, Dell, Nvidia, and Samsung.

US President Donald Trump introduced a raft of tariffs for goods imported to the US at the start of the month, and markets have been in chaos ever since. Earlier this week, a lot of those tariff hikes above the 10% baseline were paused – but not for China, which raised its own tariffs in turn.

This new exclusion policy does cover China, and mentions smartphones, laptops, hard drives, computer processors, memory chips, and machines used to make semiconductors. Most companies that deal in electronics will be breathing a sigh of relief, though some device categories apparently aren't covered, including video games consoles.

What happens next?

The move might not be enough to open up Switch 2 pre-orders in the US (Image credit: Future/Nintendo)

It's been difficult to predict the moves the US government has made in respect to tariffs in recent days, and that hasn't changed. This latest move should mean gadget pricing settles down for consumers, but it's impossible to be certain.

Bloomberg reports that the new exclusion policy could be a precursor to a whole separate tariff focused specifically on electronics. For now, the world is waiting to see how the 90-day pause on many of Trump's tariffs plays out.

As a US company which assembles almost all of its goods overseas, including in China, Apple has been in the spotlight during all of this tariff uncertainty: there have even been suggestions of Apple factories in the US and reports of iPhone panic-buying ahead of potential price rises.

Apple is one of the companies that it seems will benefit the most, though the move may not be enough to open up Nintendo Switch 2 pre-orders in the US, which have been delayed. Consoles like the Switch 2 aren't mentioned in the new exemptions, though the previous 90-day pause should mean more stock can be moved to the United States.

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