Several horizontal slots were incorporated into the lid to improve airflow inside the device. These openings allow air to enter from multiple directions, enabling the sensors to analyse the surrounding environment from as many angles as possible and providing more representative measurements of indoor air quality.
In addition, an opening was added at the bottom of the lid to provide easy access for charging the batteries without having to disassemble the enclosure. These features make the final design more convenient and efficient while improving the overall performance of the system.