RAPOO M500 Multi-Mode, Silent, Bluetooth, 2.4Ghz, 3 device Wireless Mouse Switch between Bluetooth 3.0, 4.0 and 2.4G The smart switch between Bluetooth 3.0, 4.0 and 2.4G ensures stable wireless transmission. You can still use your mouse regardless of USB port shortage or the loss of receiver. Smart switch between multiple devices Automatically pairs the working device .Intelligently switch among multiple devices, and easily switches between them. It simplifies complicated cross-platform maneuvers and meets multi-tasking requirements. Precision on nearly every surface The high-performance laser engine enables you to use mouse on virtually any surface. Enjoy a high-speed response and unrivaled accuracy. Adjustable 1600 DPI high-resolution sensorr As sensitive as you want, you can adapt the M500 Silent mouse in 4 DPI levels. The mouse’s optical HD sensor resolution can be toggled between 800DPI (for maximum precision) and 1600 DPI (for maximum speed) at the press of a button. Enjoy responsive and smooth cursor control on practically every surface. 12-month battery life With Rapoo's latest energy saving technology and power switch, you can use your mouse without power interruption for up to 12 months. Silent design This is a wireless noiseless mouse,help you create a quiet working environment.