1.Material: Plastic 
2.Function: ISSC bluetooth 3.0+USB charge+AUX in+TF card 
3.Output power: 3W*2 
4.Sensitivity: 600mV 
5.Frequency response: 80HZ - 18KHZ 
6.SNR: >70db 
7.Distortion: <0.05% 
8.Built-in li-ion polymer 3.7V ,1800mAh battery 
9.Run time: up to 12-15 hours 
10.Battery charge: about 3 hours 
11.Remote operation:10 meters(without obstacle) 
12.Water resistance: IP*4 
13.With extral 80cm micro USB cable+3.5mm audio cable