Specification Mouse Interface USB receiver Sensor technology Optical Tracking Number of buttons 3 Description Logitech M90 USB MOUSE Just plug the mouse into a USB port and it is ready to use. No software or batteries are required. Logitech reliability You get a mouse you can count on with the high quality and reliability that have made Logitech the global leader for mice. Smooth traveller You’ll enjoy smooth cursor control, precise tracking and easy text selection. Comfy, contoured shape Your hand will be more comfortable than with your touchpad. 03 Years Warranty