Ergonomic surface to reduce hand fatigue and 3 adjustable DPI options, this mouse will make your experience more enjoyable. Feature: 3 DPI: 3 adjustable DPI settings, 1600, 1400, 1200, allowing you to control cursor speed with ease. No driver required, plug and play. 2.4G: 2.4G wireless technology provides fast and reliable data transmission with wireless convenience. Comfortable: Contoured shape and textured bamboo grips provide comfort during extended use. Compatible: Works with most systems including Windows, PC, Laptop, and Computer. Energy-Saving: Auto power-off function helps conserve battery when not in use. 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: 5 Million times Rated voltage / current: DC 3V / 5mA System requirements: 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