Mice & Trackballs 2.4G Wirele Optical Mouse Vertical Mouse 6 Keys Ergonomic Mice with 3-gear Adjustable 1600DPI Mice for PC Laptop Black Mouse Features:2.4G wirele technology provides fast and stable transmiion in 10m, low latency.Powerful optical engine provides accurate click, quick response and stable signal.Ergonomic design, the 57 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.Exquisite surface treatment, comfortable hand feel.Equipped with USB receiver, plug and play, easy to use.Specification:Type: Vertical mouseColor: BlackMaterial: ABSConnection method: 2.4G wirele connectionWirele frequency: 2402-2480MHzDPI: 800-1200-1600DPIKey number: 6(left/right/roller wheel/forward/backward/DPI switch)Battery: 2*AAA batteries(not included)Item size: 12 * 9.5 * 7.9cm /4.72 * 3.74 * 3.11inItem weight: Approx. 93.5g /3.3ozPacking list:1 * Mouse