compact, uses single usb port

low transmision range. worst is the battery life in the mouse. I wish I saw the review mentioning the 5 day life, it's really true. The mouse quit working once the battery power drops just 20% which has been about 5 days for me too

low transmision range.

The mouse works when it has full battery

When I got it, the numpad didnt work out of the package and the retail store wouldnt take it back because I didnt have receipt (my bad), but the mouse's battery life is maybe 5 days if youre lucky. The USB transmitter is the size of China and...