Features: Single ear-hooked designing, 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.Built-in high-performances lithium battery, it can play continuously for 5-6 hours, talk continuously for 5-6 hours, and quickly for 1-2 hours.Speaker unit is close to ear, stereo sound effect, 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 most mobile phone models with bluetooth-compatible function.Specifications: Material: ABSColor: Black, White(optional)BLE Version: BT5.0TransmissionFunctions: battery display, call function, music support, multiple point connectionChannel: StereoCharging Time: 1-2hrsWorking Time: 5-6hrsPackage Includes: 1x Bone Conduction Earphonenote: Please allow 1-2cm errors due to manual measurement.Please allow for slight color differences due to different display resolution.