Unit of Driver: Speaker dimensions: 57 mm by 2 amps Power: 4W*2 Output power Other: Chip: IPX4 waterproof AC6965E BT, AUX, TF, and TWS Wireless are supported. operating range: 10 meters (obstacle-free) Method of charging: Type-C Measurements: 94 x 94 x 213 mm Type of Connection: Bluetooth V5.0 Battery voltage/capacity: 3.7V/1200mAh Battery Life: 6- 8 hours of playback at a moderate volume Time needed to charge: 3 hours