If you are going to spend in the neighborhood of $100.00 for a mouse you should expect a reliable product, right? I bought this MX Revolution two months ago and I now own a very attractive paperweight. The recharging system has stopped charging and it appears to be a problem experienced by other users. There are several discussion threads on the Logitech web site from others who have seen there investment become useless in record time.Save yourself the aggravation and money...opt for a device that allows you to change the batteries or at least has a charging system that won't collapse in the first two months.BIG disapointment.