Model: 

NB21

Bluetooth version : 

Bluetooth 4.0

Power : 

3W*2

Speaker size :  

1.5 inches

Battery:  

Li-polymer battery 2600mAh

Play time : 

5.5 hours (max volume) 

& 7.5 hours (50% volume)

Impedance :

4Ω

Shell :

ABS+ Silicone

Net weight: 

265g

Dimension:

Φ71*93mm