Electric Wall & Ceiling Heater Thermostat, 208/240/277V AC, 2 1/2 in Overall Depth, 2 1/2 in Overall Height, 1 3/8 in Overall Width, Compatible System Type CDF Series Heaters, Number of Poles 1, 208/240/277V AC Thermostat Control Voltage, 22 A, Contact Rating 22A @ 120 to 277V AC, Housing Color Black, Mounting Hardware, Mounting Type Unit Mount, Programming Capability Not Programmable, Mechanical Selector Dial, UL Listed, CUL Listed, Maximum Operating Temperature 90 Degrees F