Features: 2.4G wireless technology provides fast and stable transmission in 10m, low latency. Powerful optical engine provides accurate click, quick response and stable signal. Ergonomic design, the vertical type mouse fits the palm and fingers, reduces discomfort when using, bid farewell to the "mouse hand". 3 adjustable DPI(800-1200-1600DPI), easy to switch, adapt to a wide range of material surfaces, accurate and reliable position. Equipped with USB receiver, plug and play, convenient to use. Specification: Type: Vertical mouse Connection mode: 2.4G wireless Color: Black DPI: 800-1200-1600DPI Key number: 6(left/right/roller wheel/forward/backward/DPI switch) Battery: 2*AAA batteries(not included) Packing list: 1 * Mouse 1 * Wrist rest pad 1 * User manual