Total System Power: 20Watt Pure System Power (RMS): 5W x2 Frequency Response: 50Hz-18KHz Driver Unit: 52MM x 2 Impedance: 3 Ohm S/N Ratio: ≥60dB DC Input: USB 5V Bluetooth V5.0 Bluetooth transmission distance: Up to 10m TWS Bluetooth Technology: Able to pair with one more P8000 Super Speaker Built in Battery Battery Capacity(3.7V): 1200 mAh Battery playback time: 6 hours playback time with 50% volume Battery Charging time: 3.5 hours