Electric Wall & Ceiling Heater Thermostat, 24 to 277V AC, 1 1/8 in Overall Depth, 2 1/8 in Overall Height, 1 1/8 in Overall Width, Compatible Manufacturer Model Number All Dayton(R) Unit Heaters Except 2YU58, 2YU60, 2YU61, 2YU64, 4TDH6, 4TDH7, 4TDH8, 4TDH9, 4TDJ1, 4TDJ2, Number of Poles 1, 24 to 277V AC Thermostat Control Voltage, 25 A, Contact Rating 22A @ 120 to 277V AC, Housing Color Black, Mounting Hardware, Mounting Type Unit Mount, Programming Capability Not Programmable, SPST