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. It simultaneously connects to up to 3 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. Fully adjustable DPI sensor Precise down to the last pixel: with the adjustable DPI sensor, accuracy is no longer left to chance. Adjustable from 600 DPI to 1600 DPI, you can adapt it to match your preference. 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. Link:http://www.rapoo.com/product/437