● Mechanical trackball(dia:38mm) ● Its ball and roller are made of abrasion-proof stainless steel ● Dust-proof and liquid-proof ● Vandal-proof ● Specially designed to operate in harsh environments, making them ideal for web payphones, internet kiosks and other applications in public places. ● Compatible with WINDOWS98/ME/2000/XP ● PS/2 or USB connector for option ● Mounting or desktop set for option Material: • Front Panel: 304 stainless steel • Key: 304 stainless steel • Trackball: 304 stainless steel • Back Panel: aluminum alloy Electrical Performance: • Voltage: 5.0VDC ±5% • Electric current: 10mA • EMC Emission: EN55022(B) • Trackball frequency: X:>200dpi Y: >190dpi • Trackball diameter: 38mm Mechanical Performance: • Operating Temperature: 0℃ to +45℃ • Storage Temperature: -30℃ to +70℃ • Relative humidity： 30%～95% • Lifecycle: >1 million times per key • Key travel: 2mm • Actuation Force: 120g nominal • Lettering: raised key with high density printing ink Reliability: • MTBF >20000h • MTTR <30min Size: 110 x 83 mm