JSY-03 6 Keys Wireless Vertical Charging Mouse Ergonomic Vertical Optical Mouse Features: 1. Vertical hemisphere design, the back of the mouse fits the palm, reducing the pressure on the wrist and fingertips 2. Thumb groove design, the surface adopts electroplating effect, and it feels comfortable 3. The left and right buttons adopt high-pressure blue frosted oil spray texture, which is comfortable to the touch 4. Three-speed DPI speed regulation, 800-1200-1600DPI free choice 5. Mini USB receiver, plug and play 6. Micro charging port, can be fully charged in 3 hours Product parameters: 1. Material: ABS, electronic components 2. Connection with computer: wireless 3. Photoelectric resolution: 1600 (dpi) 4. Number of keys: 6 (keys) 5. Interface: USB 6. Wireless transmission frequency: 2.4GHz 7. Adjustable resolution: three gears 8. Operating distance: 10 (m) 9. Working method: photoelectric 10. Wheel direction: touch the wheel 11. Built-in battery: 500mAh lithium battery 12. Dimensions: 10.6 x 7.3 x 6 cm 13. Product weight: about 130g Packing list: Mouse x 1 USB receiver x 1 USB data cable x 1