[Safety and Security] The PTC car heater offers advantages that traditional heating elements lack, such as constant temperature heating and a high heat conversion rate. No fires or flames occur during use. We hope this small product can generate more warm air this cold winter. [Stability and Durability] The compact design ensures a longer service life. The general standard states that the power loss is less than 10% after 2,000 hours of use. For larger rooms, two or more heaters may be installed in the room. [Energy Saving] This PTC heater features automatic energy saving. The system allows for automatic regulation of the heating power within certain ranges. When the air is heated, it consumes less energy than before. With surface insulation, this device is safe to use and highly reliable. It can heat up quickly and has a long service life. It is easy to install with mounting screws. It uses high-temperature-resistant wire as the conductor, making it durable. The system allows for automatic regulation of heating output within specific ranges. It is suitable for heaters, humidifiers, air conditioners, and other common household appliances. Specifications: Condition: Rated Voltage: 12V Rated Power: 100W Mounting Screw Spacing: 87mm / 3.4 inches Mounting Screw Size: 4mm / 0.2 inches Color: Black Material: Metal + Plastic + Ceramic PTC Size: 90 x 60 x 42mm Package Contents: 1 x Small Fan Heater