Features: 1. 2.4G wireless transmission technology provides reliable connection within a range of 10m, allows you to say goodbye to the wired shackles and operate more freely. 2. Ergonomic design, fits the hand, provides comfortable feel, effectively reduces hand fatigue. 3. Humanized silent design, creates a quiet and comfortable environment whether you are in quiet office or studying late at night in the library. 4. Three adjustable DPI provide sensitive response and smooth operation, can position accurately in moving. 5. Slim design, lightweight and portable, you can easily put it in a bag or pocket, more convenient to use. 6. No driver requied, plug and play. 7. Built-in 500mAh rechargeable batter, adopt Low and energy saving technology, no need to charge the batter repeatedly. 8.Power smart pre-alerm:Once in low power,the mouse work slow to pre-alerm user to charge for mouse ,it won't die out sundenly because of none power 9.Automatically smart sleep function,once PC sleep,the mouse is sleeping automatically. Question: Why the LED of mouse is not in colour light ? Answer: make sure you have pluged the usb receiver into you PC's usb port, meanwhile make sure the switch of bottom at the position of colourul LED. Beware the mouse has smart sleep function, if your PC is in sleep status,the mouse will be automaticlly go into sleep status. Specification: Name: Wireless mouse Color: Black Material: ABS Number of keys: 4 Type: 2.4G Wireless Transmission distance: Up to 10m DPI: 800-1200-1600DPI Batter Capacity: 500mAh(rechargeable lithium batter) Item size: 11.3 * 5.8 * 2.6cm /4.45 * 2.28 * 1.02in(L * W * H) Item weight: Approx. 79g /2.79oz image Key Features 2.4 G stable transmission, Plug and Play, 10 m connect distance Automatically smart sleep function,once PC sleep,the mouse is sleeping automatically. power smart pre-alerm:Once in low power,the mouse work slow to pre-alerm user to charge for mouse ,it won't die out sundenly because of none power Microre chargeable interface, no longer pay for batteries Quiet click, no longer to interrupt others Colorful breathing LED light (can be turned off) the control button at the bottom of the mouse Sensitivity up to 1600 DPI,Switch: 800DPI/1200DPI/1600DPI 4 buttons with scroll wheel, suitable for office Android box smart TV Score high precision optical systems Ultra-precise Scroll Wheel The optical technology works on most surfaces and on all mouse mat Ergonomic design, several hours of use without fatigue What’s in the box 1 * wired Mouse Specifications SKU: GE779EA0A9NPFNAFAMZ Model: For PC ,laptop Size (L x W x H cm): 12.5x7x3.5 Weight (kg): 0.1 Color: black Main Material: ABS Shop Type: Jumia Mall