Tmvel 30 Watts 4-Port Dual Voltage 110-220V USB Travel Charger for Smartphones and Tablets (MIRA PRO) 4 port USB charging station, Compatible with iPhone, iPad, HTC phones, Samsung Galaxy Tab, Samsung Galaxy Phone, Samsung Galaxy Note, Blackberry, MP3 players, Digital Camera, & other USB devices Use your existing USB charging cables to charge most USB powered devices. Easy-to-see LED confirms whether USB charger is properly connected AC input: 100-240Vac, 0.8A, 50-60Hz,DC output: 5V USB output: 2x2A, 2x1A Highest Power rating at 30W/6 Amps output, at least twice the power of any other four port charger. Compact Design and Flip Down AC Prongs make it easy to carry on travel. Sophisticated circuit design with over-heated, over-current, over-charging protection. Charging will be automatically stop when battery is full.