Dacomex Optical Wired Mouse, PS/2. Device interface: PS/2, Movement detection technology: Optical, Movement resolution: 600 DPI. Cable length: 1.2 m. Mouse dimensions (WxDxH): 120 x 60 x 35 mm, Mouse weight: 120 g. Certification: RoHS, CE. Compatible operating systems: Windows 98/SE/ME/2000/XP