Honeywell T87K1007, Round Non-Programmable, Heat Only, Mechanical ThermostatCondition:* New Surplus Stock, In OEM Packaging. Open Box. As Pictured. Additional Notes:* The Round thermostats provide electronic control of 24 Volt ACheating and cooling systems with the classic twist to set dial.* Mercury Free* Classic Styling* Premier White* The T87K heat only works with 2 or 3 wire heat-only systems* Application: Heat only* Dimensions: 3-11/16″ Diameter x 1-3/4″ Deep (94mm Diameter x 45mm Deep)* Mounting: Round* Electrical Ratings: 20 Volt To 30 Volt AC* Frequency: 50 Hz; 60 Hz* Stages: 1 Heat* Operating Humidity Range (% RH): 5 To 90% RH (Non-Condensing)* Supply Voltage: 20 VoltTo 30 Volt AC* Power Method: Battery Assisted Power Stealing* Sensor Element: Thermistor* Accuracy: 2F ( 1C)* Switch Type: Relay* Terminal Designations: R, W, Y* Setting Temperature Range (F): 40F To 90F* Cycles per Hour: Adjustable 1, 3, 5, 9* Heat Current: 0.02 Amp To 1.0 Amp RunningHoneywell T87K1007