Driver size: 12 mm/ 0.47" Dynamic Driver, Power supply: 5V 1A, Frequency response: 20 Hz - 20 kHz, Impedance: 16 ohm, Sensitivity: 98 dB SPL@1 kHz, Maximum SPL: 95 dB, Microphone sensitivity: -38 dBV/Pa@1 kHz, Bluetooth version: 5.3, Charging time: <2 hrs from empty, Music playtime with BT on: Up to 10 hrs, Talk time: Up to 6 hrs