Small in size big on power with a 21 a rapid charger and an onoff switch for safety short circuit protection and built in safety fuse led power indicator and onoff switch unique amp luxurious design usb port to charge your devices while on the go interfacesports usb ports 1 x usb 20 compliance standards short circuit protection and built in safety fuse physical form factor usb adaptor case colour black led status indicators yes in the box 1