Version V5.3 of Bluetooth Maximum power: 8W Size of speaker: 57 mm Battery: 1500mAh, 3.7V Six hours of playback at a moderate volume Time needed to charge: 4 hours Support: hands-free calls, TF, FM, TWS, and BT Method of charging: Type-C 483g is the net weight. Product dimensions: 100 x 138 mm