describe: 1. Vertical hemisphere design, the back of the mouse fits your palm, reducing pressure on your wrist and fingertips 2. Thumb groove design, electroplating effect on the surface, comfortable in hand 3. The left and right buttons are made of high-pressure blue frosted oil spray texture and feel comfortable to the touch. Three-speed DPI speed adjustment, 800-1200-1600DPI free choice 5. Mini USB receiver, plug and play 6. Micro charging port, fully charged in 3 hours Product parameters: 1. Material: ABS, electronic components 2. Connect to computer: wireless 3 Photoelectric resolution: 1600 (dpi) 4. Number of keys: 6 (keys) 5. Interface: USB6.0 Wireless transmission frequency: 2.4GHz7. Adjustable resolution: three levels 8. Operating distance: 10 (meters) 9. Working method: photoelectric 10. Scroll wheel direction: Touch 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 1USB receiver x 1USB data cable x 1