Computer Accessory Sets features:2.4GHz Wireless Ultra-thin Mouse(Black) Color: we send based on the color or size of the main image of the product page. Quantitywe send based on quantity on title, if there is no quantity in the title, we send based on .Features1. 2.4GHz digital wireless transmission, operation distance is up to 10 meters. 2. Built-in mouse memory,no recoding is needed after battery replacement. 3. 4-section design, the service life of one AA alkaline battery is up to six months 4. Intelligent connectivity,no need to code, plug-and-play. 5. Ergonomically designed, comfort grip. 6. Dormant class control and more power-saving hibernation connectionless. 7. 800dpi/1600dpi cursor speed adjustable. 8. Shortcut button can be used to browse the Internet or applications, easily on the toolbar "forward" and "backward" function 9. Power switch, in the case of not using power off completely. Cautions1. Operation distance is closely related to the environment. 2. Battery life may be different for personal habit of using mouse. 3. In case of mouse failure,please check battery power and replace it as necessary 4. The mouse will shut off automatically and enter sleeping mode for saving power when it's not used for a long time. To wake it up, press the right or left button. 5. Never waste the battery and will it in fire. Put battery into battery recycle bin.