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. Mainly used in small instruments, small box space environment temperature heating. Application: air conditioner, electric heater, instrument, general appliance, air curtain machine, humidifier, etc. Specification:Material: Aluminum & PlasticWeight: 128g/4.5ozHeating material: PTC thermistor Heating mode: heat through the flow of airPower: 200W Voltage (Optional): 110V / 48V (the bare line is connected, regardless of the positive and negative pole, the rated voltage can be) Mounting distance dimensions: 56*68 mm (8*4 mm waist type hole) Corrugation Length: 30mmSize: 76*76*26mm/3*3*1inchPackage List:1 x PTC Ceramic Air HeaterNote:1.With 70 degrees normally closed temperature control protector.2. Lead color is random.