Material: PP + ABS Bluetooth version: 5.0 Bluetooth distance: more than 10m Lithium battery capacity: 13.5V-4000mAh*3 (12000mAh) Power: 2Ω 60W (40W + 20W tweeter) Signal to noise ratio: ≧90dB Frequency: 87MHz-108MHZ Charging interface: DC5.5mm Charging voltage: DC 13.5V-2A Working Time: Up to 5 hours Product net weight: 3.8kg