Product is cheap, I can't get it to work. It calls for 2 AAA batteries, the compartment is too big for the batteries so they don't fit correctly. There's no connection to allow the mouse to work. This purchase was a waste of money.
The mouse worked right after I turned it on, installed the batteries and plugged the USB wireless transmitter into my PC. The mouse felt a little bigger than I expected, but that just may be due to my personal preferences. The batteries were hard to pull out after I installed them. A strap built on the inside to help pull them back out would have helped.
Caveat emptor: Groupon doesn't make clear this is a USB 2.0 mouse, which causes problems when plugged into a 3.0 port, like what I have in my new laptop. It works intermittently, requiring periodic hard resets by turning the mouse off or unplugging the receiver. When it works, it's great; functional cheap mouse. However, I spent so little on it, it's already worth replacing.