1.Material: aluminum alloy 
2.Function: ISSC bluetooth 3.0+USB charge+AUX in 
3.Output power: 3W 
4.Sensitivity: 600mV 
5.Frequency response: 80HZ - 18KHZ 
6.SNR: >70db 
7.Distortion: <0.05% 
8.Bluetooth sensitivity: -90dBm 
9.Built-in li-ion polymer3.7V, 450mAh battery 
10.Run time: up to 5 hours 
11.Battery charge: about 2.5 hours 
12.Remote operation:10 meters(without obstacle) 
13.With extral 80cm micro USB cable+3.5mm audio cable