Ultra Thin USB Optical Wireless Mouse 2.4G Receiver Super Slim Mouse Cordless Computer PC Laptop Desktop (Black) SANOXY 2.4GHz Slim Optical Wireless Mouse Mice With USB Receiver for PC Laptop Mac USA Nano Mini Receiver hidden in the Mouse Bottom 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). The LED Light will Light Up. Then the mouse will connect with the dongle automatically and start working. Effective: 2.4GHz wireless transmission up to10 metres operating distance Intelligent connectivity, No Need to Code, Plug & Play Wi-Fi Range:10m Tracking Method:Optical Type:2.4Ghz Wireless