... WINDOWS98/ME/2000/XP- PS/2 or USB interface for option Technical SpecificationsMaterial• Front Panel: ... .0VDC ±5%• Electric current: 10mA• EMC compliant• Optical Trackball resolution: 1000dpiEnvironmental Characteristics• Operating temperature: -20°C ... • PS2: Win NT4, 98SE, 98ME, 2000,XP• USB: Win 98SE, 98ME, 2000,XP, Mac OS9 / ... 50 (LxWxH) IP65 Desktop Optical Metal Trackball mouse with 38mm doa,eter