CK0136B Features Super anti-jamming 5.8GHZ wireless transmission which keeps from the 2.4GHZ wireless channel Effectively avoids Bluetooth interference and WIFI equipment interference to ensure the wireless transmission stability Multimedia control keys works with the FM control keys to have shortcut operations on volume control， Internet browsing and music play 1000 DPI precision tracing engine which is 2.5 times more precise than ordinary optical engine 1000DPI high-precision invisible tracing engine provides more precise control USB mini receiver Low-power consumption and energy-saving technology General Specs Brand Rapoo  Model X1800P Type 5.8 GHZ wireless transmission Operation Range 10 meters Mouse Keys Left key， right key， wheel， switch Battery 1 x AA battery Supported OS Windows 7， XP， VISTA Button Service Life Keyboard 12 months Mouse 9 months DPI 1000 DPI