Gigabyte M5050 Curvy Optical Mouse USB Wired 800 DPI Standard Vertical Scroll 2 Buttons Outstanding contoured shape Comfortable with both hands GIGABYTE precise optical tracking system Outstanding contoured shape Comfortable with both hands Classic wired mouse with best C/P value Interface USB / Wired Tracking System Optical Sensitivity 800 DPI DPI Switch N/A Scrolling Std Vertical Side Buttons N/A Dimension (L)118x (W)59x (H)39 mm Weight 88g Cable Length 1.5 m Color Black/White/Silver/ NVBlue/DarkRed Packing Content mouse Software N/A OS Support Windows XP 32bit/ Vista/ Win7/ Win8 Warranty 2 Years Certificate CE, FCC, BSMI