This is the recharging dock that is compatible with 2,500 devices. The dock has five adapters including 30-pin and Lightning adapters for charging any generation iPhone, iPad, or iPod, two micro USB adapters (for Android, Samsung, Motorola, and more), and mini USB adapters for GPS devices and older cell phones. The unit charges up to four devices simultaneously—three that dock directly to the top of the unit and a fourth that plugs into the USB port on the side of the unit—eliminating the need for multiple unsightly cords and reducing desktop clutter. The 2.1-amp USB port is optimized to charge iPads, other tablets, and e-readers quickly. The device requires less desktop space than a tablet computer and plugs into an AC outlet. 6 3/4" L x 5 1/3" W x 1 1/4" H. (12 oz.)