This 12V/24V car heater fan provides fast cabin air heating without waiting for the engine to warm up, helping you stay comfortable even when the engine is off. It also serves as a windshield defroster/defogger and offers year‑round climate control with hot and cold wind options. The unit features 360degree directional airflow and a design that supports rapid demisting and defrosting. Key benefits Quick cabin warming without engine idle: heat the interior air rapidly so you are comfortable sooner. Clear visibility with fast defrost/defog: defrost or defog windows quickly and efficiently for safer driving. Year‑round climate control: two gears adjustable to deliver hot wind for winter use and cold wind for summer use. Flexible airflow and easy targeting: 360° rotation (up and down) lets you direct warmth to the area you want. air volume for faster results: hollow design and air inlet optimize airflow to speed demisting and defrosting. Features and compatibility Power: 12V/24V car heater suitable for a range of vehicles. Airflow: large air volume achieved through hollow design and air inlet. Direction: 360° rotation to adjust airflow up and down for precise targeting. Climate control: two modes provide hot wind and cold wind to meet seasonal needs. 23 practical use scenarios Winter preheat: turn on the heater to warm the cabin quickly before driving, reducing the wait time for the engine to warm up. Frosted or fogged windshield: use the defrost/defog function to clear windows rapidly, improving visibility for a safer trip. Summer comfort: use the cold wind setting to create a cooling breeze inside the cabin or to circulate air without warming the interior. This description stays true to the product's brand, specifications, models, and functions, highlighting the key attributes of function, compatibility, airflow design, and seasonal performance without adding extraneous details.