Features: 1.The wireless mouse adopts 2.4G wireless frequency hopping technology, which has super anti-interference ability. 2.The mouse has 3 levels of adjustable resolution, up to 1600DPI intelligent adjustment, and quickly realizes cursor positioning. 3.Using high-return chips, and built-in memory, no code matching, faster data connection and transmission. 4.The 4?way scroll wheel moves, and the left and right buttons adopt a silent micro?motion design, which makes the work quieter. 5.The mouse adopts an ergonomic shape design, is comfortable to hold, and supports plug and play, which is convenient to carry and use. specification:Item Type: Wireless Mouse Type: Optical Mouse Connection Method: Wireless Optical Resolution: 1600dpi Key Number: 4 Keys Interface: USB Wireless Transmission Frequency: 2.4GHz Resolution: Adjustable 3 speed and below Operating Distance: Approx. 5m / 16.4ft Working Method: Photoelectric Wheel Direction: 4-way wheel Battery : 2 AAA batteries (not included) PackageList: 1 x Wireless Mouse 1 x USBReceiver