High quality PTC heater: PTC heater with surface insulation, safety in use, high reliability. Easy to install: PTC heater with mounting holes, easy to install. Material: Adopts the high temperature wire as main wire, durable, heats up quickly, long life. Regulation Automatic regulation This system allows automatic regulation of the heating power in certain ranges. Application: Applicable for heating devices heating, humidifiers, air conditioning and other commonly used devices.