Material: high quality composite plasticChannel: 2Bluetooth version: 5.0Waterproof performance: IPX4How to use: In-earTransmission radius: 10mWhether single or both ears: bilateral stereoTime to market: 2018-07-06Standby time: 10 daysTransmission radius: 10mConnection between left and right cavity of the earphone: Wireless connectionHow to connect the headset to the playback device: Bluetooth connection