Features:Bluetooth version: V5.0Frequency range: 2.4GHz-2.48GHzTransmitted power:Class 2Working Range:Around 10m (open space Max.20m)Charging Voltage:5V 0.5AOperating voltage:3.7VStandby current:<0.02mA Music time: ≥8HTalk Time:≥6HStandby Time:>150HCharging time:<2HMIC:40dB±2dBSpeaker:Φ40mm/32ΩOutput power:>10mWOutput Frequeney:20Hz-20KHzBatter: Built-in lithium 350mAWorking Temperatuer:-10~+55℃Packing List:1 x T5 Bluetooth Headset