Features: 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". 4 adjustable DPI(800-1200-2400-3200DPI), easy to switch, adapt to a wide range of material surfaces, accurate and reliable position, meet your daily office and gaming needs. Exquisite surface treatment, comfortable hand feel. Powered by USB, plug and play, easy to use. Specification: Brand: ZELOTES Model: T-30 Button number6 Tracking system: Optical Connection mode: USB wired DPI: 800-1200-2400-3200DPI Button life: 3 million times Roller life: 1.2 million times Cable length: 1.8m Working voltage/current: 5V/100mA Supported system: Windows 2000/ME/XP(64bit)/Vista/Win7/Win8/Win10/Mac OS X(over V10.4) Item size: 13.4 * 9.6 * 8.3cm /5.28 * 3.78 * 3.27in Item weight: Approx. 120g /4.23oz Packing list: 1 * Mouse 1 * User manual