Features: 1) Material: fine stainless steel 2) Weatherproof, waterproof and dustproof design, wide range of application for ATM/CDM, self service terminal, medical, military, didactical, industrial and safety fields 3) USB or PS2 interface Keypad: 1) 4 x 4 layout, 2 x 4 function keys are available for option 2) Raised Braille etched and colored graphics which treated specially 3) Multi-language customizing key graphics are available for option according to customers demands Mechanical features: 1) Key lifespan: > 2,000,000 times actuation 2) Key pressure: 3N 3) Key trip: 0.45mm Electric characteristics: 1) Power supply: DC + 5V 2) Power consumption: < 1W (dynamic), < 200mW (static) 4) Input: 10 numerical keys and 6 functional keys 5) Pre-set signal and voice device interface (alarm, etc.) for option Environment adaptability: 1) Temperature range: -25oC - 45oC 3) Humidity range: 20-95% 4) Air pressure: 60-106kpa 5) Protection level: IP 65 (static) / IP 54 (dynamic) Specifications: 1) Dimensions(more optional sizes are available): a) Front plate: 100 x 100mm, 116 x 97.5mm b) Overall: 100 x 100 x 15.5mm, 116 x 97.5 x 15.5mm 2) Weight: about 0.55kg OEM/ODM orders are welcome