Features: 1.Adopts an ergonomic design, the wireless mouse can reduce the pressure on the wrist, it will not feel fatigue even after operating the mouse for a long time. 2.Using professional optical positioning technology, the positioning function of the mouse is more accurate, and the smart mini receiver can quickly connect to computers and other equipment. 3.Useing smart power saving technology, if you don't move the mouse for 5 minutes, the mouse will automatically go to sleep and will operate normally after sliding activation. 4.The mouse is made of ABS material, which is of high quality, practical and durable. And the appearance is different from the traditional mouse, which is more beautiful. 5.Wireless mouse is widely used in notebook computers, desktop computers, games, office, and it can also be given as gifts to relatives and friends, which is beautiful and generous. specification:Item Type: Wireless Mouse Material: ABS Connection with Computer: USB Wireless Transmission Frequency: 2.4GHz Signal Transmission Distance: Approx. 10m / 10.9yd Optical Resolution: 800-1200-1600dpi Number of Keys: 3(Keys) Working Method: Photoelectric Wheel Direction: Four-Way Wheel Battery : 2 x AAA Battery (Delivery Without Battery) PackageList:1 xWirelessMouse 1 x USB Receiver NoteDelivery without battery.