Specification: 
1.Wireless Bluetooth Input
2.Hand-free function
3.Play/pause
4.Vol.-/Previous song
5.Vol.+/Next song
6. Line in Aux
7. Enegy Saving, Battery Capacity Display 
8. Bluetooth connect and cancel pairing                    

 Feature:
1. Bluetooth version: V4.2
2. Bluetooth receiving distance: within 10 meters
3. Connection method: USB, Bluetooth connection
4 . Output power: 45MM speaker,  5W 
5. Charge voltage/current: DC5V, 1A
6. Wireless frequency range: 20Hz ~ 20KHz
7. Lithium battery capacity: 3.7V 1200mAh
8. Charging time:  Around 3 hours
9. Playtime: Maximum volume: 4 hours, 80%: 6 hours, 50%: 9H
10. Talk time: Around 9 hours
11. Standby time: Max 300 hours
12. Rated power: 5W stereo
13. Material: Silicone +ABS  + Metal + Fabric