Dual USB Charger features dual 10W USB ports and makes it perfect for sharing or charging two devices at once. Perfect travel size charging for 2 devices makes it easy to use in any car. Small IC chip technology that prevents your device from overcharging, overheating and short circuiting as an added safety feature to protect your valuable electronics. Small design makes it easy to travel and store conveniently in your travel bag. The 2.1A allows for faster charging of your devices.