drive: 15mm Impedance: 32 ohms Bluetooth version: Bluetooth v5.0 + EDR Power level: Level II Output power: 30 MW Bluetooth distance: 10 m barrier Frequency response: 20Hz 20000 working voltage range: 3.0 V-4.2 V. Microphone sensitivity: -42dB with A2DP / AVRCP high quality stereo audio...