Description:This computer mouse is designed with bluetooth V3.0 technology, which could be used smoothly and precisely.This kind of mouse is accord with human body engineering, avoiding wrist pain and reduce the pain of hands, making you feel comfortable to use.There are designed with 3 levels of dpi for adjusting, convenient for you to click on screen precisely, making your work more convenient.There are designed with 4 buttons and a roller that could be clicked, and the dpi is adjustable, meeting your different kinds of needs.You can put your hands on the mouse in a proper angle, and the mouse is replacement for Windows 98 / Me / 2000 / XP / Vista / Win 7 / Win8 / win10.Specification:Material: ABS+electronic components.Color: black, gray.Size: 13 * 6.5 * 7.7cm.Resolution: 800dpi;1600dpi;2400dpi.Wireless technology: Bluetooth 3.0 connection.Maximum operating range: 10m.Rated voltage /current: 3V/8mA.Power supply: 2*AAA batteries(not included).Button click life: 8 million times.How to connect bluetooth:1. Install the battery and turn on the mouse power switch.2. Then search for bluetooth devices directly in the computer add device.3. Click to connect to the Bluetooth mouse, there will show that the device has been successfully added to this computer.Note:Desktop computers need to be equipped with a bluetooth receiver to use.Please allow slight deviation for the measurement data.Due to the light and screen difference, the item's color may be slightly different from the pictures.Package included:1x mouse.(battery is not included)1x introduction.