A waterproof wireless headset with a built-in MP3 player that uses bone conduction technology so you can listen to music while also being aware of the outside world. The headset can remain submerged underwater up to 5 meters. Comes with built-in 8GB memory able to hold up to 2000 songs. The transducers create mini vibrations that tracel through your cheekbones. The sound bypasses your eardrums, travelling directly to your inner ears. Experience premium audio without blocking or covering your ears. Bluetooth version: V5.0 Music format: WAV, FLAC, APE, MP3, WMA Range: Up to 10 meters Dynamic Unit: 20.8mm Frequency range: 20Hz - 20kHz Impedence: 8 Ohm Battery capacity: 200mAh Music play time: 6 - 8 hours Standby time: 15 days Charging time: 30 hours Microphone sensitivity: -42dB What's in the box 1X Bone Conduction Headset, 1X USB Charging Cable, 1X Pair of Earplugs, 1X User Manual