Charge up to 6 USB powered devices simultaneously Surge protection up to 70 joules USB output: 5V, 2.1A (max); 7.1A (total output) DC5V/6port; On/Off power switch Bought from Amazon.com or DEWorld.com [url]http://shop.digitalenergyworld.com/USB-Surge-Protector-6-Charging-Ports-812376017885-DEUSBSURGE.htm[/url]