With the same click feel and over a 90% reduction in click noise compared to classic mice, M330 offers a quiet experience for you and those around you. It has a long-lasting 24-month battery life with auto-sleep and a powerful 33 ft wireless range with 128-bit encryption between the mouse and the receiver. Designed with contoured grips made of soft rubber for total comfort. Just plug the tiny USB receiver into a USB port. Finally, the Logitech Advanced Optical Tracking guarantees smooth and precise moves on almost any surface.