Push Button, Type Universal, Material Aluminum, Depth 2 1/4 in, Height 4 7/8 in, Width 3 1/4 in, Color Silver, Input Voltage 12/24V DC, Operating Temp. -40 Degrees to 120 Degrees F, For Use With Door Entry/Exit, Emergency Button, Includes 2 Sets of Form C Contacts, 300 Combos, Lens, Messages