Multifunction: can supply power for all kinds of smart mobile phone such as iPhone4/4s, HTC,LG, MOTOROLA, Nokia, Samsung, iPad 1 /iPad 2, MP3, MP4, PSP, GPS, etc. You can also use your original USB charging cable. * Double USB Output: Out 1 (1A); Out 2 (500MA),more convenient. High efficiency of power conversion. Can supply power of two digital products at the same time. Electricity-saving function. With LED power indicator. Press the button to charge and press it again to stop charging. * Security guard: With a special lithium battery protection board .effectively prevent over charging, over discharging, over current, short circuit, etc. * Plug and Play: Use USB port to supply power, you can charge digital product at any time and place once plug the data line, cable can be realized portable, ready to charge.