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 1Adopts of PTC ceramic heating element and aluminum tube, low thermal resistance, high heat transfer efficiency. 2This product is a electric heater with automatic constant temperature and energy saving. 3This PTC ceramic air heater has the characteristic of surface insulation and high security. 4With mounting holes, easy to install. 5Application: air conditioner, electric heater, instrument, general appliance, air curtain machine, humidifier, etc.