Ultra Powerful: Max 3.1A output， charges 3 smartphones， or 1 tablet+2 smartphones， or 2 tablets simultaneously at full speed， saving your time.Space-Saving: Easy to take along due to folding plug.Super Portable: Quad-Port USB charger yet almost the same size as some single port ones; size of 2.99 x 2.24 x 1.14 inches and weight of 3.7 ounces.Smart Technology: The 3 smart ports can automatically recognize the devices connected and output the amount of current that would allow for the fastest charging possible for each. They are compatible with nearly all devices with 5.3V input as well.Input: 100 v to 240 v 50 to 60 hz 0.35 A 10 to 16 vaOutput: 5.3 V， 2.0 A