OTRON &reg; Quad Port USB 2.1A 10W AC Travel Wall Charger (White) Quad Port USB AC Charger charges your iPad, iPhone, iPod, HTC, Blackberry, MP3 Players, Digital Cameras, PDAs, Mobile Phones. Use your existing USB charging cables to charge most USB powered devices / Easy-to-see LED confirms whether USB charger is properly connected. Soft blue LED shows when charger is receiving power. Input:100-240V 300mA ; Output:DC 5V 2.1A Max. or 10W (A combined total of Max. 2.1A). Sophisticated circuit design with over-heated, over-current, over-charging protection. Charging will be automatically stop when battery is full.