Features Suitable for Small Spaces Within 0.5 Cubic Meters: Insulated air heaters are suitable for heating, dehumidification, and heat preservation in small spaces within 0.5 cubic meters. They are very useful electronic accessories. Temperature Resistance Can Reach 200°C: The wire used in the heater is high temperature resistant silicone wire, and the temperature resistance can reach above 200°C. With Fan: The small constant temperature heater is designed with a fan. Due to the temperature resistance limit of the fan, the heater is suitable for the ambient temperature range of -5-65°C. Precise Manufacturing: The PTC thermistor heater with fan is made of selected electronic components, has a precise manufacturing process, and is relatively durable. The general standard is that the power attenuation is less than 10% after 3 years. Scope of Application: PTC thermistor heater is suitable for heaters, air conditioners, automobiles, etc., with a wide range of applications. Specification: Voltage: 110V Rated power: 250W; 350W(Optional) Working voltage of fan: 12V; 24V (Optional) Product dimension: Approx. 90 x 61 x 42mm / 3.5 x 2.4 x 1.7in Distance of installation hole: Approx. 86mm / 3.4in Diameter of installation hole: Approx. 4mm / 0.16in Suitable room: <0.5m³ Package list: 1 x PTC Heater with Fan Note: 1.Red is the positive pole and black is the negative pole. 2.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. 3.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. 4.The actual product color may deviate from the photo due to light. 5.There may be a slight deviation in the measurement of product. 6.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. Package List