... number. 2. Military technology shell,Alloy steel,antiwear 3. Exquisite design,easy cooperating. 4. Pneumatic pressure ... 5. Dual power,built in 3.7v 500mah lithium battery,external dock 3.7v 1020mah battery,it can be used as ... Channels in 3(2.1) 3 horns suppot multi-media playing function.2.With the battery,you can ... . Speaker Power:3W,4Ω 2. battery capacity:600mA,3.7V. 3.Input:100-240V 50/60Hz 150mA Output ...