Featuresr 2 usb 20 ports can be used to charge two devices at the same timer high quality good efficiency low energy consumption and fast chargingr over charge protection and short circuit protectionr small size and light weight portable and convenient to operate at homes in offices and in travelling etcr widely suitable for usb charging devices such as apple samsung google and htc tablet pcs iphone ipod cell phones mp3 mp4 players gps devices etc r easy operation just pl