about this project [The air purifier runs automatically after the car is started] The smart mode is turned on by default, and the micro-vibration sensor detects the dynamics in the car in real time to realize the automatic start and stop of the car. The cabin air purifier turns on automatically when you start the car. After the car is turned off, it will automatically turn off after a delay of 180 seconds. Solar panel USB dual chargingInnovative solar panel USB dual charging, good news for energy saving and environmental protection. Quadruple FiltrationThis portable air purifier adopts HEPA accordion pleats, coconut shell activated carbon, HEPA gauze, plasma electrolysis, perfect to improve the air in your car, small room or office. Additional Fragrance SlotThere is an additional incense trough inside the car air purifier ionizer, you can place or replace the incense sticks to purify the air and add pleasant aroma to you. The gentle scent helps you relax, focus and feel energized. [Simple operation, classic design] No complicated operation is required, and it is a good driving companion. Exquisite body, stylish color, very suitable for car, bedroom, living room, outdoor. Size: 210mm*150mm*50mm