Magicfly Power 3 AC Outlet Wall Mount Surge Protector with Dual USB Charging Port USB Output: 5V, 2.1A;Maximum current for USB output: 2.1A Charge devices simultaneously through three available AC outlets Joule Rating: Around 450J;Clamping voltage: 500V;Maximum Spike Current: 22500A AC Input & Output: 125V, 15A, 1875W Compatibility: Cellphones,iPads, Tablets, Printer,eBook Reader and more