With the same click feel & over a 90% reduction in click noise compared to classic mice, M330 offers a quiet experience for you & those around you. It has a long-lasting 24-month battery life with auto-sleep & a powerful 33 ft wireless range with 128-bit encryption between the mouse & 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 & precise moves on almost any surface. Connector / Port / Interface: USB 2.0; Left / Right Hand Use: Right; Mouse Technology: Optical; Wired / Wireless: Wireless.