Magicfly Power 6 AC Outlet Surge Protector Wall Mount Socket with 2 USB Wall Charger 2.1A Compatibility: Cellphones,iPads, Tablets, Printer,eBook Reader and more AC Input & Output: 125V, 15A, 1875W USB Output: 5V, 1.1A ; Maximum current for USB output: 2.1A Joule Rating: Around 450J Clamping voltage: 500V;Maximum Spike Current: 45,000A