Product Description Model : S21 BT Version : 5.3 Playing Time : 3-4 Hours Charging Voltage : DC 5V Speaker Battery : 500mAh Output Power : 5 Watt Charging Time : 1-2 Hours Play Mode : BT/TF/U Disk/FM Music Format : MP3/MAV Wireless Distance : 10 Meter Net Weight : 232g
