Media control Fn keys give you quick access to functions like media player homepage volume adjustment etc. Long battery life With Rapoo’s energy saving technology you can use your keyboard and mouse for 12 months without power interruption . 1000 DPI tracking engine You will enjoy accurate and smooth cursor control with the 1000 DPI high-definition invisible tracking engine. Plug-and-forget NANO receiver So small and unobtrusive you can plug it into a USB-port and forget about it. No more worries about lost receivers.