Smart function: An intelligent sensor detects when the car door opens or closes, turning on the light to illuminate entry and exit while optimizing power use for safer access. Ecofriendly rugged design: Durable and recyclable construction with a builtin 500 mAh battery and USB charging port. Provides vivid projection for up to 69 days on a full charge. Easy to charge: Includes a dedicated base that attaches to the door. The base can be removed for charging without interrupting door operation, and the light returns to its original position after charging. Easy installation: Attaches to the inside of the car door using the included doublesided tape. No drilling required, and the light stays securely in place. Practical use scenarios: Nighttime parking in dim garages or lots, providing illumination for safer entry and exit. Families with children, guests, or elderly passengers who benefit from better door visibility. Quick, temporary use across multiple vehicles in a household or rental fleet for consistent door lighting.