Specification: Item Type: Bluetooth Earpiece_x000D_Material: ABS_x000D_Bluetooth Version: 5.2+EDR_x000D_Talk Time: About 20 Hours_x000D_Listening Time: About 20 Hours_x000D_Wireless Frequency: 2.4GHZ_x000D_Transmission Distance: Approx. 10m / 33ft_x000D_Charging Time: About 1 Hour_x000D_Standby Time: 120 Hours_x000D_Microphone Sensitivity: -42dB_x000D_Working Temperature: -10-50_x000D_Built in Polymer Lithium Battery: 300mAh (built in) Features: 1With 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. PackageList: 1 xBluetoothEarpiece 1 x Charging Cable 2 x Ear Cover 1 x Manual