What is achieved by the gentle vibration from the air cylinder?

The gentle vibration from the air cylinder is designed to provide a cylinder capacity warning. This feature serves as an important safety mechanism for firefighters who rely on the air supply from the cylinder while working in potentially hazardous environments. The vibration alerts the user that the air supply is running low, prompting them to monitor their air usage more closely and take appropriate actions such as returning to safety or refilling the cylinder.

The other elements such as low battery indication, air quality check, and temperature alerts are typically managed by different systems or equipment and are not directly related to the function of the air cylinder's vibration feature. The focus of this design is purely on air capacity, ensuring that users remain aware of their air supply status in critical situations.