This is a 5-port USB charging system including one QC3.0 quick charge port and four 2.4A (max) chargin ports. It is a smart device, meaning that it detects the proper charging current for each device plugged in, keeping the current to the proper lever so your device is not overcharged or charged too fast, harming your device.
It is an attracitve and useful device that is plugged into your 120V house current and converts to the proper USB voltage levels. We are using it to charge my iphone, a tablet, and a couple of other device, all simultaneously. It works gret and we are very pleased with it's design and quality.