Type: Bluetooth bone conduction headset version: bt4.1Horn: bone conduction microphone sensitivity: 88 k3dbMicrophone: analog signal sensitivity: - 42 k3dbFrequency response range: 50 ~ 20kHz, charging interface: support, micro 5pinBattery: Li battery, 230mah, charging time: 2hStandby time: ≥ 7d