Precise temperature control of your cooling and heating equipment. 40?F to 100?F gives the operator a great range of temperature settings. Durable powder-coated steel enclosure will stand up to the toughest conditions. Change from Heating to Cooling with just a flip of the switch. Discrete green power light indicates operation of equipment. Built in 4?F split differential. 15 Amps maximum/120 Volts/60 Hz.