Ergonomic Design for Sports:Designed for sports enthusiasts, these earphones feature an open-back design and silicone earpads for a secure fit Waterproof & Materials:Enjoy your workout without worry, thanks to the waterproof design and PVC and silicone materials Wireless Bone Conduction Headphones For Sports|Wireless Bone Conduction Technology:Harness the latest wireless bone conduction tech for a liberating, hands-free audio experience during sports Bluetooth Connectivity:Seamlessly connect to your devices via Bluetooth for a stable, clutter-free wireless audio journey Active Noise Cancellation:Immerse in your audio without distractions using these wireless bone conduction headphones with Active Noise Cancellation Model:B8 Bluetooth version:5.3 horn:Bone conduction oscillator Playback duration:11 hours (medium volume) Waterproof:Level water proof capacitance:180mAh frequency:20Hz~20KHz Distance Ef fective distance:10M (The product printed words depending on the batch, but this does not affect use) Color: Black & Blue Material: plastic Package Contents: 1*Bone Conduction Sport Headphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.