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 500/1000 DPI optical sensor for smooth movement control.  Power saving: if there is no 2.4GHz signal， it will automatically power off.  Pen shaped， especially suitable for handwriting input.  Real Plug and Play， no extra driver needed.  Low voltage alarm function， reminds you to replace battery in time.  Designed with a wheel for page turning during PPT presentation.  Specifications:  Color: black + red  Tracing system: optical  Operation frequency: 2.4GHz ~ 2.483GHz  Operation distance: up to 10 meters， 360°  Resolution adjustable: 500/1000cpi  Operating current: 15mA  System requirement: Windows 2000/XP/Vista/7， Linux， Mac OS， Android OS (with standard USB interface)  Battery type: 1 * AAA Battery (not included)  Item size: approx. 14 * 2.3 * 1.5cm / 5.5 * 0.9 * 0.6in  Package size: 18 * 12 * 4.5cm / 7.1 * 4.7 * 1.8in  Package weight: 96g / 3.4oz  Package included:  1 * Pen Mouse  1 * USB 2.4GHz Receiver  1 * Mount