The stainless steel 16-key keypad is vandal-resistant and meets industrial demands. It is integrated with metal dome PCB electronics controller, which is also protected by stainless steel housing. The industrial metal dome PCB has gold-on-gold key switch technology and a short stroke of 0.45mm. There is excellent tactile feeling allowing for precise data input. The top stainless steel plate also has a sealing gasket delivering easy & tight sealing. It can be mounted on a panel or enclosure. There are threaded bolts for top mounting. Compliance with EMC directive 89/336/EEC EN55022: 1988+A1:2000+A2:2003 EN55024: 1988+A1:2001+A2:2003. Emission caters to EN 50081-1 and Immunity to EN 50082-1. The lifespan is less than 5 years. There is Carbon-on-Gold key switch technology. PCB interface are PS2, USB, RS232, RS485. Supports different OS like DOS/Windows95/ 98/ NT/ ME/2000/2003/XP/Vista/WIN7, Linux, Unix, Mac OSX. Communication parameter is PS2/USB. There are 16 actuators, including back-up keys.