The idea of the ValueRays/IGMProducts Warm Mouse Pad is to provide some heat to your mouse hand via the USB ports on your PC. It also touts a 4-port USB hub. It is sold through ValueRays (the same folks who provides the Warm Mouse which I use every day and can endorse). But you can skip this one. It’s much too large, it doesn’t heat up very well, and when I tried to return it for a refund never heard back from them. So I’m out in the cold for $29.99 plus the return shipping.