The MO-7100GY features a 5-button design including a scroll wheel so you can navigate your documents, spreadsheets or favorite web pages quickly and easily. With 6D optical technology, this mouse delivers smooth navigation every time with its enhanced 1000 DPI resolution! Just plug in the mini USB receiver into an available USB port and begin surfing the web without a cable trying to slow you down!General Features: Gray color 2.4GHz wireless frequency Mini USB receiver 5-Buttons Scroll Wheel Page Back, Page Forward buttons (side) 1000 dpi resolution 6D Optical Technology Plug and Play Ergonomic DesignUnit Dimensions: 1.5 x 2.6 x 4-inches (H x W x D, approximate)Package Includes: iMicro MO-7100GY 5-Button 2.4GHz 6D Wireless Optical Mouse Mini USB receiver