Ipevo USB SuperCharger Multi-Charger Dock for iPad, iPhone, iPod and USB Devices (PC01) Charge four iPads at the same time using a single wall socket Great for conference rooms, classrooms, and any space with multiple iPads Ideal for keeping your students' iPads charged in 1-to-1 iPad programs Maximum power output of 2.1 amps for each USB charge port - no power compromises! Also works with a range of other USB devices, like iPhone, iPod and other smartphones Portable size - swap between tables, offices, and classrooms UL certified (File Number: E360767) over-heat and over-current protection