1、Adopts of PTC ceramic heating element and aluminum tube, low thermal resistance, high heat transfer efficiency. 2、This product is a electric heater with automatic constant temperature and energy saving. 3、This PTC ceramic air heater has the characteristic of surface insulation and high security. 4、With mounting holes, easy to install. 5、Application: air conditioner, electric heater, instrument, general appliance, air curtain machine, humidifier, etc. 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: 134g/ 4.7oz Heating material: PTC thermistor  Heating mode: Heat through the flow of air.  Lead 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: 150W  Mounting distance dimensions: 55*68 mm  Size: 76*76*26mm/3*3*1inch (corrugation length 30mm)  Package List: 1 x PTC Ceramic Air Heater