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1. Interface: USB2. RGB colorful lights3. Number of keys: 7 keys4. Operating distance: 10m5. Working method: photoelectric6. Support ergonomics7. Adjustable resolution: four gears8. Built-in 500 mAh lithium battery9. Drive-free 2.4G wireless receiver10. Wheel direction: four-way wheel11. Lightweight, more comfortable operation12. Optical resolution..