Features: Adopt 2.4G wireless transmission technology, the transmission distance up to 10m. No driver required, plug and play. Bionic Shape design, combine the flexible bounce shape of the crayfish with mouse design, and novelty. Silent button design, whether you are in a quiet office or studying late at night in the library, this mouse will create a quiet and comfortable environment. Ergonomic design provides comfortable hand feel and effectively prevents from wrist ache in long time use. The mouse adopts integral aluminum alloy sandblasting CNC integrated molding, which is resistant to corrosion and can strengthen the overall structure of the mouse. Built-in 500mAh large capacity rechargeable battery, can be used for several months. No need to charge the battery repeatedly, more convenient to use. Specification: Brand: HXSJ Model: T37 Color: Black/Pink( optional) Type: 2.4GHz Wireless Transmission distance: 10m Operation Mode: Opto-electronic Power Type:Rechargeable Number of keys: 4 keys DPI: 800-1200-1600DPI Key life: 5 million times Battery capacity: 500mAh( Rechargeable) Working voltage/current: 3.7V/8mA Item size: 11 * 6.5 * 3.5cm /4.33 * 2.56 * 1.38in(L * W * H) Item weight: Approx. 81.7g /2.88oz Package size: 13.1 * 8.1 * 4.5cm /5.16 * 3.19 * 1.77in(L * W * H) Package weight: 135g /4.76oz Note: The color of receiver and charging cable please refer to the actual product! Package list: 1 * Wireless mouse 1 * USB receiver 1 * USB cable 1 * User manual