2.4GHZ Wireless USB Optical Mouse Mice DPI 1600 for PC Mac Laptop£» Specifications: 2.4Ghz Wireless Optical Mouse. Three DPI:800,1200,1600. Scroll easily in any direction. Nano Mini Receiver. Built-in Energy Saving system. Wireless Technology works on most surfaces. Mini Receiver can be contained and easy to carry. Effective: 2.4GHz wireless transmission up to 10 metres operating distance. Intelligent connectivity, No Need to Code, Plug & Play. Power: 2 x AAA Batteries(Not Included). Compatible with win98/2000/XP/Vista,MAC,Linux,Windows 7/8. Color:Red. How to use: Step1: Open the Battery Cover(Underneath the Mouse), Install 2pcs Alkaline AAA Batteries. Step2: Take out the USB Nano Dongle, and close the Battery Cover. Step3: Plug the USB Nano Dongle in the USB Port. Step4: turn the Power Switch Button to "ON" (Underneath the Mouse). Then the mouse will connect with the dongle automatically and start working. package content: 1x 2.4G wireless mouse 1x wireless receiver no retail packing