Specification: Voltage: 110VRated Power: 250W; 350W(Optional)Working Voltage of Fan: 12V; 24V (Optional)Product Dimension: 90*61*42mm / 3.5*2.4*1.7 inchesDistance of Installation Hole: 86mm / 3.4 inchesDiameter of Installation Hole: 4mmSuitable Room: <0.5m³ Package list: 1 * PTC Heater with Fan Note: Red is the positive pole and black is the negative pole.The outlet wires of heaters and fans can be separately connected to the power supply. Fans must be inputted by DC. PTC heaters are not divided into AC and DC.The power of all PTC products is not a fixed value, but a range. The power range of this fan heater is within the (+20%) range of the labeled power. The power of different ways of using the same product is different. Simply speaking, the better the heat dissipation, the greater the power.The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. Small fan structure decomposition diagram Safety protection, insulation and temperature resistance Temperature resistance 280℃, PA66 nylon shell Temperature resistance 200℃, insulated high temperature resistant wire Temperature resistance 350℃,insulated high temperature resistant protective cover Thermostatic heating Using ceramic constant temperature heating technology, continuous heat output, automatic constant temperature work Rapid response PTC quickly converts electrical energy into heat after power on, you can feel the hot air within 30S Note: please note that the new type and old type of this product will be sent randomly,and make sure you will not mind before ordering.