... on-off switch to prevent the power consumption, the colorful LED display the power and electricity state. Specifications:1. ... to charge from PC directly. When charging, the LED will light on one by one in blue light ... There is three LED button on shell surface means 30%, 70% and 100% of the power remaining inside of ... , 4G, mobile phones, MP3, MP4, PSP, etc Portable power bank 5000mAh 2 usb port