Mechanical data: Key: 81 tactile feel keys in super quality brushed stainless steel Key top style: plain/non-protuberant rectangular keys with laser engraved and etched legends and raised braille on keys are available Touch pad cover: composite More than lifetime 10 million strokes Mutual capacitance sensing: X/Y position sensing resolution: 40 counts/mm X/Y position reporting: relative Output (self-detectable depending on cable): PS2 or USB Tracking speed: maximum 1,016m/second Power supply voltage: 5V DC, ±0.25V Current rating (active mode): 17mA Front plate: super quality brushed stainless steel Short key travel: 0.45mm Switch life: 5 million operations Actuation force: 2.0N for key 14 x 14mm (pressure point) 4.0N for key number 14 x 28mm (pressure point) Lettering: sunk laser legends and characters in high quality ink Actuator/keys materials: stainless steel Gross weight: 2.0kg Dimensions: 392.0 x 110.0mm (front panel), 416.0 x 134.0mm (back panel) Electrical data: Supply voltage: 5V DC ±5% Current rating: 20mA EMC standard: the council EMC directive 89, 336 and EEC EN55022: 1988 + A1:2000 + A2:2003 EN55024: 1988 + A1:2001 + A2:2003 Emission: EN 50081-1 Immunity: EN 50082-1 Lifespan: >5 years Switch contact material: gold-on-gold key switch technology with metal dome PCB Interface: PS2, USB available, RS232 for EPP OS: DOS, Microsoft Windows95, 98, NT, Me, 2000, 2003, XP, Vista, Linux, Unix, Mac OSX Environmental adaptability: Operating temperature: -20 to +60?C Storage temperature: -30 to +70?C Operating RH: 30 to 90% RH Atmospheric pressure: 60 to 106kPa Saline mist: 96 hours, IEC 60512-6 Damp heat test at +40?C: 21 days, IEC 60512-6 Dry heat test at +85?C: 10 days, IEC 60512-6 RoHS compliant, CE and FCC Protection level: IP65 (front panel) Key lifespan: >5 million actuation Touch pad lifespan: >10 million strokes MTBF: >50,000 hours