Multifunctional warmth and windshield defogging: primarily warms the air while effectively clearing frost, fog, mist, and snow from the windshield to ensure clear visibility and safer driving. Dual operation modes: auto heater fan offers a warm mode and a natural wind mode, providing flexible airflow to suit different weather conditions. Rapid heating: designed to heat air quickly so you don't have to wait for the engine to warm up, delivering immediate comfort in cold weather. Flexible and comprehensive coverage: features a 360degree rotating base for easy directional control and a 1.1meterlong wire for extended reach, allowing you to defog and heat multiple areas of your vehicle for visibility and comfort. Use scenario: at startup on frosty mornings to clear the windshield before driving; use during winter to rapidly defog side windows and interior surfaces for safer visibility; use in humid or rainy conditions to prevent interior fogging and maintain a comfortable cabin environment.