Features: 1. 2.4G wireless technology, plug and play 2. With storage compartment, can store USB receiver 3. With intelligent power saving mode, it will automatically shut down if it doesnt move for 5 minutes 4. ABS environmentally friendly material, comfortable to the touch, fits the shape of the hand, and can effectively reduce fatigue 5. Small and portable Product specifications: 1. Number of buttons: 3 buttons + a 3D scroll wheel 2. Compatible system: Win 2000/Win NT4.0/Win XP/Win.NET/Win 7/Win 8/Win 10, Mac OS X10.8 3. Return rate: 250Hz 4. Working frequency: 2.4G 5. Switch: FD3 million times white point 6. Resolution: 1600DPI 7. Working current: 11mA 8. Battery: 1.5V AA battery (not included) 9. Size: 100x60x40mm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin