Brand new and high quality Easy to install. Square connector standard on heaters. Product Type:Heater Sensor connector Universal Fitment=YES Model: NTC50K Line: 2 lines Applicable: Suitable for 2kw 5kw Air Parking Heater The inside temperature sensor(in the controller) is installed on the air inlet of heater, it measures the air temperature at the air inlet, according to the temperature change the working state of the furnace and adjust the output of the thermal power. The outside temperature sensor is optional part which require extra configuration and can be put those heating you want. Same working principle as inside temperature sensor . Colour:Photo Color Material:plastic Package Contents: 2X Connector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.