Ergonomic surface to reduce hand fatigue and 3 adjustable DPI options, this mouse will make your using experience more enjoyable. Feature: 3 DPI: 3 adjustable DPI switch, 1600, 1400, 1200, control your own speed freely. No need any driver, plug and play directly. 2.4G: 2.4G wireless transmission technology, enjoy the fast data transmission at the convenience of the wireless technology. Comfortable: Contoured shape and textured natural bamboo grips keep your hand comfortable even after long hours. Compatible: Compatible with most system including for Windows, PC, Laptop, Computer and other device. Energy-Saving: The auto switch off function will save energy, it will switch off when your PC is turned off. Specification: Model Number: MG95 Project Type: Ergonomics Optical Mouse Resolution: 1600/1400/1200DPI Maximum Working Range: 10m Color: Yellow Material: Bamboo Battery Capacity:2*AAA battery (not included) Button Click Life: 5Million times Rated voltage / current: DC 3V / 5mA System requirements: for Windows Vista / Win 7 Item Size: Approx. 9.1cm * 5.5cm * 2.6cm / 3.6in * 2.2in * 1in Item Weight: Approx. 84.1g / 2.96oz Package Size: Approx. 16.5cm * 10cm * 4.2cm / 6.5in * 3.9in * 1.7in Package Weight: Approx. 177g / 6.23oz Package List: 1 * Mouse 1 * USB Receiver 1* English User Manual