Item Type: Bluetooth EarpieceMaterial: ABSBluetooth Version: 5.2+EDRTalk Time: About 20 HoursListening Time: About 20 HoursWireless Frequency: 2.4GHZTransmission Distance: Approx. 10m / 33ftCharging Time: About 1 HourStandby Time: 120 HoursMicrophone Sensitivity: -42dBWorking Temperature: -10-50Built in Polymer Lithium Battery: 300mAh (built in)Package List1 x Bluetooth Earpiece1 x Charging Cable2 x Ear Cover1 x Manual1With Mic: Mini Bluetooth earpiece uses a high definition radio microphone to make communication more pure. 2Digital Display: Bluetooth earpiece digital power, real time display, check the power of the headset anytime, anywhere. 3High Performance: Handsfree headset has a 33ft barrier free connection, without lag, no delay in games. 270 degree rotation, wear it left or right. 4Large Capacity Battery: Bluetooth earpieces for cell phones built in 300mAh battery, about 20h talk time and 20h listening time. 5Waterproof Structure: Driving headset with mic has nanometer coating waterproof structure, whether it is rain or sweat can be well isolated.