Features: 1.The left and right buttons adopt a silent and micro-motion design, ergonomic shape design bring an comfortable grip 2.250Hz high return chip bring faster data transmission. Innovative red light technology, energy saving and power saving 3.Using the latest 2.4G wireless frequency hopping technology, possess super anti-interference ability 4.Intelligent adjustment of up to 1600DPI, which realize rapid cursor positioning 5.Built?in memory, no need to code with smart connection. Adopt for Nano receiver, plug and play, easy to carry specification:Item Type: Wireless Mouse Type: Optical mouse Connection with Computer: Wireless Optical Resolution: 1600dpi Number of Keys: 6 (keys) Interface: USB Wireless Transmission Frequency: 2.4GHz Resolution: Adjustable three levels and below Operating Distance: Approx. 10meter / 32.8ft Working Method: Photoelectric Wheel Direction: Four-way wheel Battery : 2 x AAA batteries (not included) Size(LxWxH): Approx. 103.5 x 70.5 x 38.6mm / 4.1 x 2.8 x 1.5in PackageList: 1 x Mouse 1 x USB head