Dacomex Mini Optical Mouse, USB. Device interface: USB, Movement detection technology: Optical, Movement resolution: 800 DPI. Cable length: 0.7 m. Mouse dimensions (WxDxH): 90 x 51 x 31 mm, Mouse weight: 60 g. Compatible operating systems: - Windows 98/SE/ME/2000/XP/NT - Mac OS 8.0 +