Provides Silent Operation and Narrow Differential Control for Heating or Cooling Installations for use with a 2-Wire 24 Volt Thermostat U.L. listed and C.S.A. approved. Design complies with U.L. 873 T.I.R.E. standard (Temperature Indicating & Regulating Equipment) *FEATURES • Level-Temp allows low voltage 2-wire thermostat to control line voltage loads such as baseboard heaters. • Conduit hub or screw mounting. • Ideal for all types of electrical heat. • Non-critical mounting angle. Universal break-off mounting tabs. • Dual Level-Temp capable of controlling two separate loads