ANA Series Air Pressure Switch 0.05 (-) 0.02 to 12.0" W.C., Change Contacts on Decreasing Pressure 0.68 (-) 0.05" W.C.,300 VA Pilot Duty 120 to 277 VAC, 15A Non-Inductive to 277 VAC 50-60 Hz, Operating Temperature:-40 F to 180 F(-40 to 82 C), Air-Maximum Pressure:1/2 PSI, Dims:2 1/2"H X 3 1/4"W X 5 5/8"L, Weight:12oz, In Box, Made in USA.