







Nank(Naenka)
Runner 4 Bone Conduction Headphone
- Premium sound quality:Nank 3th ResoVibe™ Technology and OT leakage reduction 3.0 technology, which effectively minimizes the amount of sound that escapes from the headphones.
- Lightweight: weighs only 26g, provides a comfort experience.
- Bluetooth 5.4+ IPX8+ 8 hours play time + 16 GB MP3 player

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- Premium sound quality:Nank 3th ResoVibe™ Technology and OT leakage reduction 3.0 technology, which effectively minimizes the amount of sound that escapes from the headphones.
- Lightweight: weighs only 26g, provides a comfort experience.
- Bluetooth 5.4+ IPX8+ 8 hours play time + 16 GB MP3 player
- Premium sound quality:Nank 3th ResoVibe™ Technology and OT leakage reduction 3.0 technology, which effectively minimizes the amount of sound that escapes from the headphones.
- Lightweight: weighs only 26g, provides a comfort experience.
- Bluetooth 5.4+ IPX8+ 8 hours play time + 16 GB MP3 player
1. Only TF mode supports working underwater.
2. TF mode only supports MP3/M4A/WAV/APE/FLAC format files.
3. Pressing the volume button too quickly will cause the volume to fail to change.
Take a Closer Look

How Bone Conduction Headphone Performs?
Unlike traditional headphones that rely on eardrum vibrations, bone conduction technology delivers sound directly through your skull. By bypassing your eardrums entirely, these headphones send vibrations to your inner ear, keeping you aware of ambient noise—perfect for runners, cyclists, and outdoor enthusiasts.
Comfort Open-ear Experience
Experience natural listening freedom with our open-ear bone conduction technology – stay aware of your surroundings while enjoying comfortable, earbud-free audio.

Safety & Enjoyment
The open-ear design allows you to enjoy music without missing your surroundings
Free Your Hands & Safe And Efficient
Premium configuration
With lightweight and extended earhook, the bone conduction headphone is safe for swimming, no worries on battery life.
Quick Charge for Up to 2.5 Hours
Born for Sports
With skin-friendly silicone and ergonomic design, the Runner 4 Bluetooth bone conduction headphone is not easy to slip, perfect for swimming ,trail run, park run and bicycle activities.

How to wear bone conduction headphone correctly?

Easy Control
The Bluetooth headphone have a useful physical button to control playback.You can easily control play, pause, answer calls, and end calls with one hand, allowing you to easily switch between calls and music.
Parameter Comparison

Model
Noise Cancellation:
Waterproof:
Play Time:
BT Version:
Mode:
Weight

Runner 4
√
IP68 3th Gen Waterproof
8 Hours
Bluetooth 5.4
Bluetooth/ TF Mode
26g

R-Diver2 Pro
√
IP69 3th Gen Waterproof
10 Hours
Bluetooth 5.4
Bluetooth/ TF Mode
32g
FAQ
Shipping
Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout. We run discounts and promotions all year, so stay tuned for exclusive deals.
The delivery time is usually 7-10 business days. Since the shipping address is in the US and Hong Kong, China, if the shipping address is in the US or China, the delivery time is 3-4 days.
Product
Yes, Nank Runner 4 bone conduction headphone is specially designed for swimming, We enhanced its water resistance. You can get rid of Bluetooth and mobile phones to enjoy music in MP3 mode.
No, Bluetooth does not work underwater. Bluetooth uses the 2.4GHz radio frequency, which doesn't work properly underwater because water molecules weaken the signal. Bluetooth devices have a transmission range of only a few inches underwater compared to about 30 feet in the air, so with regards to swimming bone conduction headphones we recommend switching to MP3 mode.
You can follow the tutorial in this blog to download the music: Full Guide: How to Download Spotify Music for Offline Listening?
The sound quality of bone conduction headphones is not as good as that of earbud headphones due to the different ways in which sound is transmitted and produced.
To switch between sequential and random playback modes in memory mode, press the power button four times consecutively. You'll hear a "beep" sound, indicating a successful switch.
When the device is powered on, click the volume "+" and "-" buttons at the same time.
The waterproof performance of Runner4 is IP68, and it can be immersed in fresh water at a depth of 1.5-3m for 0.5-1 hour. It can cope with daily waterproofing, such as rain, short-term swimming, etc.
The waterproof performance of Runner4 is IP68, and it can be immersed in fresh water at a depth of 1.5-3m for 0.5-1 hour. It can cope with daily waterproofing, such as rain, short-term swimming, etc.
Just pass the knots at both ends of the adjustable silicone belt through the holes on both sides and tie them to the main body of the earphone, and then move the silicone belt forward and backward to adjust the tightness (the knots at both ends of the adjustable earphone line are in the same direction).