UL Listed (UL File #MH60484, Model #SP072). 4000 mAh Lithium Polymer Grade A Non-Recycled Battery. Features A USB Output And Micro USB Input (Cord Included). LED Indicator Lights. Output: 5 Volts/2.1 Amp. Charges Most Phones, MP3 Players And More!. Requires Your Phone’s Charging Cord To Charge Your Device.