Features Adopts of PTC ceramic heating element and aluminum tube, low thermal resistance, high heat transfer efficiency. This product is a electric heater with automatic constant temperature and energy saving. This PTC ceramic air heater has the characteristic of surface insulation and high security. With mounting holes, easy to install. Application: air conditioner, electric heater, instrument, general appliance, air curtain machine, humidifier, etc. Specification: Material: Aluminum Weight: 77g/2.7oz Heating material: PTC thermistor  Heating mode: Heat through the flow of air.  Le-ad material: silica gel high temperature wire  Voltage: 12V (the bare line is connected, regardless of the positive and negative pole, the rated voltage can be)  Power: 100W  Mounting distance dimensions: 101*31mm  Size: 115*35*26mm/4.5*1.4*1inch (corrugation length 30mm)  Package List: 1 x PTC Ceramic Air Heater Package List