Product Name: Ceramic Heating Sheet. PTC heating element. Application: Heating appliance. Input Voltage: 5-220V. Size: Appx.35*20*5mm. Heat material: PTC Thermistor. Heat methods: heat conduction. Lead wire: high temperature line. Temperature: 40-270 Degrees Celsius. Do not soak in water, and do not remove the surface film. Sales unit: 1pc. Usage: Food dehumidification, tea drying, electronic chip preheating, instrument heating dehumidification, electronic components constant temperature preheating. Advantages of PTC constant temperature heating pads: In small and medium-sized power heating applications, PTC heating pads have constant temperature heating, no open flames, no redness on the surface, and high heat conversion rate. Love power supply voltage fluctuations have advantages over traditional heating elements such as small impact on the machine and long service life. Small size, easy to install and secondary development. The surface remains constant temperature and will not damage the heated equipment due to continuous temperature rise. Without open flames, it is not easy to cause fires and explosions. Energy saving, suitable for year-round insulation and preheating of small and dry power equipment. Long lifespan, manufactured using year-round automated unmanned small equipment for heating and dehumidification. It can be cooked frequently in the afternoon, and when heating the liquid, it will not be damaged even if it burns dry. The power can be automatically adjusted, with fast heat dissipation and high power. If the heat dissipation is small, the power will automatically decrease. Precautions for using PTC constant temperature heating pads: Guan Zi Power: The heating power varies from small to large, then to small, and finally stabilizes. Package include: 1Pc PTC heating element. Notice: 1.Transition: 1cm=10mm=0.39inch. 2.Please allow 1-2mm error due to manual measurement and make sure you do not mind before ordering. 3.Please understand that colors may exist chromatic aberration as the different placement of pictures.