From the Gold Medallists
What they love.
World-class opinions. In their own words.
@archie_goodburnArchie Goodburn
British Champion
@honeyosrinHoney Osrin
Paris '24 Olympian
@m4ttrichardsMatt Richards MBE
2× Olympic Champion
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01
Proper game changer.
- Matt Richards MBE -
Falling out? Not a chance.
Stay put.
Stay on.
Your earphones fall out halfway through training - you know the feeling. One hand on the rope, the other constantly minding your earbuds.
The Sprinter 100's 35° adjustable Fit-Tip™ wraps securely around your ear - not inside it. Set once, forget it.
Safe & Sound
Music and
the world.
Earbuds block traffic, coaches, training partners - a serious safety issue for outdoor athletes. Bone conduction delivers music through cheekbones, leaving your ears completely open for awareness.
Using them in the office too? Fold in the Fit-Tip™ to block out noise. Best of both worlds.
Sweat damage? Unheard of!
Headphones that
survive the water.
Sweat resistance isn't waterproofing. Most headphones corrode or die in the gym within months - let alone the pool.
The Sprinter 100 is IPX8 rated - full submersion. The same spec Ampact's Olympic & World champions train with every day.
MP3 mode
Leave your
phone in the locker.
Bluetooth signal doesn't travel underwater - that's physics. So most swimmers train in silence - and that's boring.
8GB storage built-in, the Sprinter 100 holds 2,000+ songs to play in MP3 Mode. Load your playlist, dive in or work out without your phone weighing you down.
Size Guide
Your perfect fit.
Same technical specs. Two neckband sizes.
Tap image to see how they fit →
Regular · Longer neckband
A relaxed fit, comfortable for larger heads
Mini · Shorter neckband
A closer fit for average heads, ideal for smaller heads
Still not sure?
The Regular is the comfortable first choice. Runners & gym-goers love the Regular most. Mini is the go-to for swimmers, cyclists, and is the top pick for most ladies.
Genuine Customer Unboxing
See exactly
what arrives.
No filters. No editing. A real unboxing clip by one of our customers - from the outer shipping box all the way through, exactly as it lands.
Detail matters.
The full picture.
Tech specs & FAQs.
Technical Specifications
- Headphone Drivers :
16mm Bone Conduction Transducers - Frequency Response : 20–20,000 Hz
- Microphones : 1x Omni-directional
- Bluetooth Version : 6.0
- Bluetooth Profiles : A2DP / AVRCP / HFP
- Audio Codec : SBC, AAC
- Range : Up to 10m / 33 ft
- Memory Capacity : 8 GB
- Supported Music Formats:
MP3 / FLAC / WAV / APE / M4A - Input : 5V 200mA
- Playtime : Approx. 10h
(based on 70% volume level) - Charging Time : Approx. 1.5h
- Battery : 180 mAh Rechargeable
- Lithium-ion Polymer Battery
- Operating Temperature : 0–45°C
Product Basics
Q: What are bone conduction headphones?
A: Bone conduction headphones deliver sound through vibrations on your cheekbones, leaving your ears completely open. This means you can hear your music while still being aware of your surroundings — essential for outdoor sports and hearing coach instructions in the pool.
Q: What’s the difference between the Regular and Mini size?
A: The Mini features a shorter headband designed specifically for female athletes, juniors, and anyone with a small-to-average head circumference. It’s also ideal for sports requiring caps or helmets. Both sizes deliver the same audio quality and premium features.
Bluetooth & Connectivity
Q: Does Bluetooth work underwater?
A: No – Bluetooth signals don’t transmit through water. That’s why we include built-in MP3 storage. For swimming or phone-free use, simply load your music directly onto the headphones and you’re ready to go.
Q: Do they support multi-device connection?
A: Yes! The Sprinter Series support standard Bluetooth multipoint and can connect up to two devices simultaneously.
Q: Can I take calls with these?
A: Yes – the built-in mic allows for hands-free calling and digital assistance activations when connected via Bluetooth.
Swimming & Water Use
Q: Waterproof?! Really?
A: Yes – IPX8 rated and tested to 5m submersion, they are designed for swimming, open water, and all-weather training.
Q: Will they fall out during flip turns or hard push-offs?
A: No – the adjustable fit and secure design keep them in place through flip turns, starts, and high-intensity intervals.
Q: Do I really need those little mic plugs?
A: The mic plugs are mainly to prevent limescale build-up in hard water areas. The mic itself is perfectly waterproof (tested to 5m direct exposure), so if they pop out mid-set, honestly just toss them. A bit of our overengineering! 😅
Music & Playback
Q: How do I load music to the headphones?
A: Just plug them into your computer via the magnetic USB cable – they’ll show up like any USB drive. Drag and drop your music files directly into the folder. No software needed. We support MP3 / FLAC / WAV / APE / M4A formats.
Q: How do I switch between Bluetooth and MP3 mode?
A: A 2-click on the multifunctional “M” button toggles between modes. Simple. And in MP3 mode, a quick 4-click on the “M” button toggles between shuffle and sequential play.
Q: Do they work with Spotify/Apple Music?
A: Yes – in Bluetooth mode, you can stream directly from any app. Bluetooth signal doesn’t work through water, so for underwater listening, you’ll need to use MP3 mode. Simply download your playlists as MP3s (many online services allow this) and transfer them via USB.
Battery & Charging
Q: How long does the battery last?
A: Approximately 10 hours of continuous playback.
Q: How do I charge them?
A: The magnetic clip-on cable attaches easily – no fiddly plugs. A full charge from empty takes about 1.5-2 hours.
Q: Is the charging cable included?
A: Yes – every box includes 1x magnetic charging/data transfer cable.
Durability & Warranty
Q: What’s the warranty?
A: All Sprinter 100s come with a 1-year warranty against manufacturing defects.
Q: How do I return if there’s an issue?
A: Contact us with your order number and issue description. If a return is needed due to manufacturing defect, we’ll provide a prepaid shipping label.
Orders & Shipping
Q: Do you ship internationally?
A: Yes – we currently offer free worldwide shipping!
- UK domestic orders are typically sent by Royal Mail.
- EU orders are fulfilled by our warehouse in Germany.
- Asia & Americas orders are handled by our APAC centre in Hong Kong.
All orders take up to 2 days for processing, plus 2-7 days for delivery depending on your location.
Q: What’s in the box?
A: Sprinter 100 / 100 Mini headphones, magnetic charging/data cable, mic plugs, and Quick Start Guide.
Q: Can I try them risk-free?
A: Yes – 14-day return policy. If they’re not for you, send them back (see Refund & Exchange for details).
tomroberts2001 (verified owner) –
These are my workout jacuzzi headphones and I can just wash off the post-gym ick! Highly recommended.
gtharris (verified owner) –
Great fit. Essential for running.
bigben (verified owner) –
Open ear + waterproof = ultimate outdoor combo. Hiking with these means nature sound blended music, epic!
alice.turner (verified owner) –
I ordered standard but was a lil big and had to size down. return was swift tho.
fk.rahim (verified owner) –
Open ear awareness is the real deal. Biked through KL traffic and could clock every car honk. Safety first fr.
freyastewart078 (verified owner) –
I brought these to train for my marathon and I like the premium silicone feel of it, they are adjustable and sit comfortably on my ears and I can hear my running partners now. Totally worth it.
pat_mccann (verified owner) –
think i just found my forever running headphones!
bailey.c (verified owner) –
I had these for awhile and am impressed. Only drawback: back of them prevents laying your head on workout benches. Sound is incredible in either way of wear open or immersive. If your like me and have the issue with ear buds staying in, this solves it perfectly. Would recommend.
sheena_greenwood04 (verified owner) –
Returned for minis and they’re perfect. Girls just get minis and save yourself the exchange. these are too big! Sound quality is good, and I like the ear pieces are adjustable. Nice colour too, turns heads. Love them.
robfowler (verified owner) –
They work really well and don’t move at all. Best part is I can barely notice them on my head and one charge lasts the whole day I use them for commute and at work too.
becca.mitch (verified owner) –
I brought thse for my hubby and he said they are comfortable. He wears them everyday.
jules_jules (verified owner) –
good headphones
pete_morgan (verified owner) –
This is our second pair. My wife tried them and borrowed permanently.. Mini fits well but no red and I don’t mind them bigger. You can clearly hear what you’re listening to and also hear what is going on around you. Good value for money.
mickbrennan (verified owner) –
Different, but I like the freedom of not being in my ears to hear surrounding. very comfortable to wear, sound quality is great.
alexwilson722 (verified owner) –
They are adjustable and very comfortable to wear for long hours. Would recommend.
johnnypatterson (verified owner) –
Very well made piece of gear thanks!
db2003 (verified owner) –
I ordered regular but they were too big for my head. Contacted support and swapped for the mini. Get mini if you swim. Good service, very responsive.
martin_k (verified owner) –
Open-ear feels so much safer in the city. They’re very comfortable to wear and not having to worry about water damage is a huge plus. Highly recommend!
Molly (verified owner) –
Received couple of days ago and tried swimming with it first time today. Crisp sound under water and makes routine training a lot more enjoyable. Love the fact that I can easily wash them down after training and need no maintainance.
jsharris (verified owner) –
These are very comfortable to wear first of all, even for a glasses-wearer. They pair with my iphone easily and won’t produce an irritating buzz or rattle against my head like some other models I’ve tried.
They aren’t particularly loud but the sound is clear, and you can fold the arms to block out noise. They are made to hear your surroundings though to run safely so I kinda get it.
Customer service was very responsive too answering my email. Cheers!
Chris (verified owner) –
I’ve tried a few other brands, the sound from these is probably the best I’ve heard from bone conductions. Build quality very good too.