I brought this brand of wireless about a month ago. And today it stopped working! I turned off the mouse & left it off 2 minutes before I replaced the batteries in it; which had the ones that it came with still being used. When the mouse light didn't come on it I thought there was a problem with the receiver in my laptop so I shut down my laptop waited another 2 minutes than tried another USB port for the receiver than I turned my laptop back on & there was still no light. I'm having to use a USB wired mouse until I can get another wireless mouse. Though I won't be buying this brand when I get the new mouse. I know you get what you pay for. But, I was expecting my mouse to last longer. To anyone thinking of buying this brand; DON'T. Buy, another brand instead