We need a smart advertising screen for auto-rickshaws. The screen should be 18.5 inches, Full HD, with 4GB RAM, 32GB storage, and a SIM slot for 4G or 5G connectivity. It must include an mmWave motion sensor that detects when passengers are inside the auto. If passengers are present, ads should start playing automatically. If no passengers are detected, the screen should go into sleep mode to save power. The device should run on Android OS and support cloud-based ad updates. It should be powered by the auto battery (12V) and designed to withstand vehicle vibrations.