Material: Silicone
Version: Bluetooth 4.0
Battery: Built-in 60mAh rechargeable lithium polymer battery
Transmission distance: 10 meters
Talk time: about 9 hours
Standby time: about 180 hours
Charging time: 1-2 hours
Function: voice control answer, caller name, phone waiting, redial, volume adjustment, music playback, one for two, can connect two devices, noise reduction, Chinese and English switching, 180° rotation, left and right ear wear