Connector: PS/2 Key Layout: 104 Key Life Cycles: 20 million Special Designed Key:: 1 power management key , 16 Internet/Media hot keys Operating Force: 55 +/- 12 gm Travel Distance: 3.8 +/- 0.2 mm Safety: FCC, CE Dimensions: Length : 460 mmWidth : 196 mmHeight : 38 mm Environmental Condition: Operating Temperature : 10 °C ~ 40 °CStorage Temperature : -40 °C ~ 60 °CHumidity : 5% ~ 95% RH, Non-Condensing Contact Resistance: 500 Ohm max Contact Bounce: 15 ms Max Power Consumption: 300 mA, max@5V