2.4G Wireless Optical Vertical Mouse 6 Keys Ergonomic Office Mouse 3 Adjustable Moving speed Comfortable Hand Feel for PC Laptop Grey Features: 2.4G wireless connection, fast and stable, up to 10m transmission distance, low latency, bid farewell to the messy cable. Ergonomic design, the vertical type mouse fits the hand curve, reduces discomfort when using, bid farewell to the "mouse hand". 800/1200/1600DPI 3-gear adjustable DPI, easy to adjust response speed. Equipped with forward/backward button, more convenient operation. Powerful optical engine provides accurate click, quick response and stable signal. The USB receiver is hiddened in the battery compartment, not easy to lose, plug and play. Specification: Type: Vertical mouse Connection mode: 2.4G wireless Color: Black/Grey/Red(optional) DPI: 800-1200-1600DPI Key number: 6(left/right/roller wheel/forward/backward/DPI switch) Battery: 1*AA battery(not included) Item size: 11 * 8 * 4.5cm /4.33 * 3.15 * 1.77in Item weight: Approx. 76g /2.68oz Packing list: 1 * Mouse