Ⅰ. No flame, no redness, no toxic or harmful odor. Some products include overheat protection for comprehensive surface electrical insulation. Ⅱ. It can heat solids and gases, meet different heating requirements and is reliable. Ⅲ. Using ceramic constant temperature heating technology, constant heat output, automatic constant temperature operation. Ⅳ. After electrification, the electrical energy is converted into thermal energy within 10 s within 0.1 s and transferred to the surface of the aluminum shell within 10 s. Ⅴ. Provide a continuous heat source with a service life of more than 20,000 hours. Ⅵ. Item Type: PTC Heater; Material: Aluminum, Ceramic; Model: None; Voltage: AC 220 V; Power: 300 W; Heating: Heat conduction through flowing air; Application: Air conditioners/electric heaters/cars/meters/home appliances/fans/humidifiers; Size: as shown; Packing List: 1 x Heater. Ⅶ. No flame, no redness, no toxic or harmful odor. Some 230V heating elements have overcurrent protection against full-surface electrical insulation. The 230V heater can heat solids and gases and meet different heating requirements. The 220V heater uses ceramic heating technology with constant temperature, constant heat output and automatic constant temperature operation. After the electrical energy is converted into heat energy within 10 seconds, it is transferred to the surface of the aluminum shell within 0.1 seconds. Continuously provide the heat source with a service life of more than 20,000 hours.