The Mobile Edge Card Reader & 3-Port Hub is really 2 devices in one! On one hand, it reads all formats of multimedia cards you might use with your camera, PDA or other device. On the other hand, it adds 3 USB 2.0 ports to your computer system, meaning you can connect your devices, whether at home or on the road. A 1-2 punch of productivity, the Mobile Edge Card Reader & 3-Port Hub is ready to keep you moving and working at the same time! One-Year Warranty