The Honeywell L641A1039 Cylinder Thermostat is a programmable heating control designed for corded electric systems. With a 2-wire wire configuration and surface-mounted rectangular shape, this thermostat is compatible with universal brands and models. Made of white plastic, it features a control style with a rotary knob and operates at 230V of line voltage. Ideal for frost protection, this thermostat by Honeywell offers simple and efficient system switching for heat-off functionality.