Four blue and one red indicator lights, display the status of charging or output and surplus electricity energy "The automatic shutdown function (without connecting to the external products, if touch the switch button carless for output about 25 seconds, the power device will automatically be turned off)". USB TYPE A interface with short circuit protection function The internal intelligent management system will automatically choose quick charge or slow filling and control stop charging "Suitable for Apple digital products, smart mobile phone, PDA, cell TV audio products, GPS, PSP, MP3 / MP4, digital camera, etc". Size 85*55*15mm.