This 2-in-1 car windshield defrost and defog warm air heater is a multi-functional all-season vehicle accessory designed to resolve foggy and frosted windshield troubles while delivering comfortable in-car temperature adjustment for daily driving. Powered by standard 12V cigarette lighter plug, this compact heating and cooling dual-purpose fan realizes rapid warm air output for quick defrosting and demisting in cold winter, and natural cool wind circulation for ventilation under high temperature summer weather, meeting year-round vehicle usage demands. Equipped with a flexible telescopic mounting bracket ranging from 6cm to 12cm, the heater supports 1620-degree multi-angle rotation and vertical tilt adjustment, allowing users to freely direct airflow toward windshields, side windows or passenger seating areas. The mini streamlined body only measures around 12.5cm × 8cm, occupying minimal dashboard space without blocking driving sightlines, bringing space-saving portable performance for sedans, trucks, SUVs and vans of all models. A simple two-speed physical switch is reserved on the device rear for effortless mode switching between warm wind and natural wind, with stable power output and balanced airflow to avoid overheating or uneven temperature distribution. The package contains the main heater unit, adhesive mounting base and power cord with cigarette lighter plug, requiring no extra installation tools—users just attach the base on clean dashboard surfaces, clip the heater bracket and plug into the vehicle power outlet to finish setup within seconds. This portable car heater is an independent aftermarket auto accessory, not original OEM vehicle equipment, with fully original shell and structural design free of patented automotive trademarks. Minor measurement discrepancies may exist due to manual size detection, and the vehicle itself is not included inside the packaging box. The solid heat-resistant outer casing effectively insulates internal heating components for safer long-time operation, efficiently melting frost layers and eliminating dense window fog to restore clear driving vision within minutes, ideal for daily commuting, road trips and winter outdoor driving scenarios.