Compucessory Optical Travel 3-Button Mouse with Scroll wheel, silver/black, high resolution 800 CPI, USB Compatible, Vista Compatible - CCS30131, Sold as 1/EA Color: Silver, Color: Black, Design: Ergonomic, Movement Detection: Optical, Movement Resolution: 800 dpi, Pointing Device Connectivity Technology: Wired, Pointing Device Host Interface: USB, Pointing Device Wireless Technology: Not Applicable, Scroller: Scroll Wheel Sold as 1 each