2.4GHz wireless connection, up to 10m operation distance (depend on environment).<br> If there is no 2.4GHz signal, it will automatically power off to save power.<br> Ergonomic pen shape design, fits comfortably on your hand.<br> With low voltage alarm function, reminds you to replace battery in time.<br> Real plug and play, no extra driver needed.<br> Material: ABS<br> Operating Frequency: 2402MHz - 2480MHz<br> Transmission Distance: >10M, 360 Degrees<br> Resolutions Adjustable: 500 / 1000cpi<br> Tracing System: Optical<br> Operating Current: 15mA<br> Button Numbers: 4 Buttons<br> Rated Work Voltage: 3V<br> Rated Work Current: 15mA<br> Channel: 16 with Automatic Frequency Hopping<br> Power Supply: 1 x 1.5V AAA Battery (Not Included)<br> System Requirements: for Windows98/XP/Vista/Windows7, for Tablet PC, for Mac OS X, for Linux<br> Features: Wireless, Ergonomic Design, Pen Shape, Easy to Use<br> Size: 140mm x 20mm x 15mm/5.51" x 0.79" x 0.59" (Approx.)<br> Color: Red, Gray, Blue(optional)<br> Packing list:<br> 1 x Pen Mouse<br> 1 x 2.4G Receiver