The ruggedized R style 212R keypad features a cast aluminum housing and all metal faceplate that has been treated with polyurethane to increase its protection from corrosion. The ruggedized uses an all metal Braille, alpha-numeric keys. There is also an internal sounder that is used to indicate key press feedback. The Ruggedized's housing can be mounted to a variety of surfaces. Suggested mounting includes; gate goosenecks, post, concrete walls, etc. Additional tamper resistance is provided with the onboard tamper loop that can be used to indicate the removal of the faceplate. Get protected against unauthorized access, while also reducing fraud and identity theft with this keypad access device By using key code technology this keypad access device provides robust and affordable security Dramatically enhance the security of door with this keypad access device Designed to be used as a door-mountable Specifications Current draw: 108 mA maximum (add 30 mA for each additional relay) Operating voltage: 12-24 VAC/DC - auto adjusting Dimensions: 3.75″ W x 5.25″ H x 2.50″ D Temperature tolerance: -20F to 130F.