Speed-Link Copperhead. Device interface: USB, Movement detection technology: Laser, Movement resolution: 2000 DPI. Minimum hard disk space: 35 MB. Compatible operating systems: Windows 2000 / XP / X64 / MCE 2005 / Vista / Vista64, Minimum system requirements: Available USB port CD-ROM Drive (for drivers), Mouse dimensions (WxDxH): 66 x 130 x 41 mm