M330 SILENT PLUS 24-month battery life (1AA battery)Auto-sleep mode On/Off switch 10m wireless range Advanced Optical Tracking Nano-receiver Unifying-ready With the same click feel and over 90% noise reduction compared to classic mice, M330 SILENT PLUS offers a quiet experience for yourself and those around you. It has a long-lasting 24-month battery life with auto-sleep and a powerful 10-metre wireless range with 128-bit encryption between the mouse and the receiver. Plus, ite(TM)s designed with contoured grips made of soft rubber for total comfort. Just plug the tiny USB receiver and it works with Windows®, Mac, Chrome OS" or Linux®. Finally, the Logitech® Advanced Optical Tracking guarantees smooth and precise moves on almost any surface. In the box: Wireless mouse Nano receiver 1 AA battery (pre-installed) User documentation 2-year manufacturer's guarantee and full product support