mobilephone speaker with external battery *Switch On&Off through Detecting Audio Signal *2200mAh Lithium ion Battery Capacit 2012HOT mobilephone speaker with external battery    OEM & ODM service are welcome...Welcome to inquiry!    Spec.: Portable External Battery for Mobile Devices2200mAh Lithium ion Battery CapacityHigh Quality & Full Frequency Speaker Switch On & Off through Detecting Audio SignalPower Input & Output through 1 USB Port.          More detailed pics:    Packaging:  

Various colors or customized colors:

2012HOT mobilephone speaker with external battery