The Logitech Wireless Mouse M280 is specially shaped to be comfortable in your hand with special curved grips made from soft rubber. Logitech Advanced Optical Tracking ensures high responsiveness and smooth, precise tracking, and the battery can last up to 18 months without needing to be changed. When not in use, the mouse puts itself to sleep to save power. The mouse uses a Nano receiver for wireless connectivity. Simply plug the tiny receiver into a USB port on your computer and forget about for instant connection every time.