With the Logitech Performance Mouse MX you'll have the power to achieve. You can track precisely on more surfaces -even glass tables (4 mm minimum thickness) - thanks to Logitech Darkfield Laser Tracking. The flexible recharging system uses a micro-USB cable to recharge your mouse through your computer or a standard wall outlet - even while you?re using it. You?ll always have the power you need to get the job done. The tiny Logitech Unifying receiver stays in your notebook. There's no need to unplug it when you move around so there?s less worry of it being broken or lost. And you can easily add compatible wireless mice and keyboards to the same receiver.