Details USB 3.0 Receiver Wireless Mouse 2.4G Silent Mouse 4 Buttons 2000DPI Optical Computer Mouse Ergonomic Mice For Laptop PC Feature - 4 Button USB Wireless Mouse for Computer / pc / Laptop Power Saving Mouse Verison - Silent (Mute ) / Sound Color - Black / Red / Green / Grey Battery - 2 * AAA battery (Not included) 2000 DPI Key Life - 10 million times Wifi Range - 10m. 4 Button Wireless Mouse Computer ( Left ; Right ; Scroll wheel ; DPI ) 1 Year warranty service