... IPHONE, etc, IPAD etc tablet PC, and digital camera, PSP, MP3, MP4 and other digital products provide large capacity backup ... ion battery protective and battery capacity intelligent display ; 2. SD USB Speaker A) Support TF card MP3 , Always listen to ... ; technical parameters : 1. Portable Power Source a. charging voltage : USB charging , charging voltage 5V b. charge current : 1000mA c. Double ...