Applicable Models Solar Car Vent Fan with Dual Power Auto Cooling for DS 4 2021 2022 2023 Triple Power Supply and Fast Cooling Operates from solar energy, builtin battery, or USB charging for continuous airflow Quickly reduces cabin temperature, helping to improve comfort on hot days and during long drives Dual power options provide flexibility when sunlight or battery is limited UltraQuiet and EnergyEfficient Brushless motor delivers very low noise, typically under 25 dB Low power consumption supports efficient operation without draining fuel or battery excessively Designed for use during commutes or breaks without distraction Easy Installation Adjustable clipon design attaches securely to car vents without tools No wiring required; plugandplay setup for convenient use Use Scenarios Hot days and long drives: quick cabin cooling for immediate comfort Breaks and rest stops: refreshes air in the cabin before resuming travel Daily commuting: adds extra cooling without putting strain on the vehicle electrical system Key Attributes Function: dual power operation with auto cooling capability Compatibility: DS 4 models 2021, 2022, 2023 Performance: fast cooling, low noise, energy efficient Installation: clipon, tool, plugandplay