Y20 4 Keys Colorful Glow Charging Mute Mouse Notebook Game Wireless Mouse, Colour: 2.4G + Bluetooth (Silver) Features: 1. Optical engine, three-speed DPI speed regulation, 800-1200-1600DPI free choice 2. Built-in 500 mAh lithium battery, long battery life 3. The connection distance is 15 meters, which is more convenient to use 4. Colorful lighting effects, beautiful and practical 5. Dust-proof roller, sensitive and not stuck Product parameters: 1. Material: ABS, electronic components 2. Connection with computer: wireless 3. Photoelectric resolution: 1600 (dpi) 4. Number of keys: 4 (keys) 5. Interface: USB 6. Adjustable resolution: three gears 7. Working method: photoelectric 8. Wheel direction: four-way wheel 9. Wireless transmission frequency: 2.4GHz, Bluetooth 3.0, Bluetooth 5.1 10. Built-in battery: 500 mAh lithium battery 11. Charging time: 2 hours 12. Battery life: 60 days 13. Dimensions: 11.3 x 5.7 x 2.5 cm 14. Product weight: about 66 grams