1. Optical resolution: 1200DPI 2. Number of keys: 3 keys 3. Working method: photoelectric 4. Interface type: Mini USB 5. Operating distance: 10 meters 6. Working voltage: 1.5V 7. Dimensions: 6 x 11.5 x 3.8 cm 8. Power supply: 1 x AA battery (not included) 9. Channels: 16, automatic frequency modulation 10. System support: compatible with Window 7/XP (64)/Vista/Windows 8 11. Comfortable, non-slip matte grain texture cover 12. Automatic sleep, power saving design 13. Non-slip texture roller design, comfortable hand feeling and free control
