* Bluetooth 3.0
* Compatible with 4.0, 3.0, 2.0
* Apply to mobile phone, MID, tablet, laptop, normal soundbox become BT soundbox, earphone, amplifier
* Distance 20M in field
* 1 to 2 function
* Material: alunimium
* Builded in lithium battery, last for 12 hours
* Supports AC and battery dual model
