**1.Anti-Water Grade: IPX7
**2.Bluetooth Version: V3.0+EDR
**3.Frequency Range: 2.4GHz
**4.Power Rating: 3W
**5.SNR: ≥85dB
**6.Operating Voltage: 3.7V
**7.Charging Voltage: DC 5V
**8.Charging Time: 2～3hours
**9.Music Playback Time: 3～5hours
**10.Transmission max Distance: 10M
- See more at: http://www.ewondercn.com/Bluetooth_Speaker/10.html#sthash.gFrjwRU8.dpuf