It is a Sensitive Stainless Steel NTC Thermistor Probe, Type : NTC 10K/B3950 1%, Measurement range : -25°c to 125°c (-13°F to 257°F), Total Length : 3 meters (9.8ft), Suitable for temperature measurement and control of household air conditioners, car air conditioners, refrigerators, freezers, water heaters, water dispensers, dishwashers, washing machines and dryers.