**Material: ABS + Silicone
**Bluetooth version: V3.0
**Output power: 3W
**Transmission distance: about 10 meters
**Battery: Li-polymer battery 3.7V / 600mah
**Operating voltage: 5.0V DC
**Playing time: 3-4 hours; charging time: 2-3 hours
**Function:
**1. Bluetooth wireless transmission
**2. Built-in microphone, so you can enjoy hands-free calling and support call-back function
3. Use high-quality audio decoder chip, make you to experience the perfect sound
4. Support all Bluetooth-enabled devices, the wireless connection distance is about 10 meters
5. Unique fashion design, with metal carabiner, so you can enjoy wonderful music for outdoors
6. Support TF card mainly MP3 / WMA / WAV audio formats
7. Fully enclosed design, waterproof level up to 6, the appearance of silicone material can be crashproof
- See more at: http://www.ewondercn.com/Bluetooth_Speaker/72.html#sthash.bcd456Yz.dpuf