Techsolo TT-121. Device interface: PS/2. Movement resolution: 520 DPI, Movement detection technology: Optical. Cable length: 1.25 m. Keyboard dimensions (WxDxH): 480 x 240 x 30 mm, Mouse dimensions (WxDxH): 120 x 70 x 50 mm. Compatible operating systems: Windows 98/ME/2000/XP