Features: Ear-hooked style designed, can be enjoyed by gently hung on the ear, comfortable to wear. Waterproof and sweatproof, not afraid of sweating, great for driving, hiking, bicycling, and other outdoor activities. High-definition microphone, intelligent noise reduction, omni-directional stereo sound effect, senseless-delay, enjoy all kinds of game. Lightweight designed, light and easy to wear, ergonomic designing, more secure to wear. Bluetooth-compatible connection, widely compatible, supporting multiple music platform, can be used for iOS, Android, notebook, mobile phone models with bluetooth-compatible function. Specifications: Material: ABS Color: Black Length: about 35cm/13.77inch Model: K69 Bluetooth-compatible Version: V5.2 Transmission Distance: 10meters Speaker: Bilateral Stereo Waterproof Level: IPX5 Battery Capacity: 90mAh Play-time: about 7-8 hours Note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different monitor resolution. Package includes: 1x K69 Bone Conduction Earphones