I RECEIVED THIS MICROSOFT PRODUCT D.O.A. ! THE LIGHT NEVER LIT AND I DON'T KNOW IF IT'S THE FAULT OF THE BATTERIES OR THE MOUSE. I WILL BE RETURNING IT AS I HAVE ORDERED ONE FROM BEST BUY THAT WAS ON SALE. IT DOES NOT USE STANDARD AA OR AAA BATTERIES. SO GETTING BATTERIES FOR THIS MOUSE WILL NOT BE EASY. AGAIN - I WILL BE RETURNING THIS MOUSE. A.S.A.P.