Features: Innovative mini pen-style mouse provides accurate and easy control of the mouse cursor. 2.4GHz wireless connection, up to 10m operation distance. Adjustable 800/1200 DPI optical sensor for smooth movement control. Power saving: automatically powers off when no 2.4GHz signal is detected. Pen-shaped design, suitable for handwriting input. True Plug and Play, no additional driver required. Low voltage alarm function alerts user to replace battery. Equipped with a scroll wheel for page turning during presentations. Specifications: Color: Red, Blue, Grey Tracing system: Optical Operation frequency: 2.4GHz 2.483GHz Operation distance: Up to 10 meters Resolution: Adjustable 800/1200 DPI Operating current: 15mA System requirements: Windows 2000/XP/Vista/7, Linux, Mac OS, Android OS (with standard USB interface) Battery: 1 x AAA battery (not included) Package Included: 1 x Wireless Pen Mouse 1 x USB Receiver 1 x Mount 1 x Instruction Manual