What is a key characteristic of the QUICK CONNECT system?

The QUICK CONNECT system is designed for efficiency and ease of use in the connection and disconnection of gas tanks, making option B the key characteristic. This system allows for a straightforward "snap in and snap out" mechanism, enabling users to quickly connect or disconnect gas tanks without the need for additional tools or complex procedures. This essential feature enhances operational efficiency, particularly in medical environments where timely access to gas supplies is critical.

The other options do not reflect the main benefit of the QUICK CONNECT system. It does not require manual adjustment, which is critical for ensuring rapid deployment. Also, it is specifically designed with unique connectors tailored for specific gases instead of a standard set, which would be less safe and less efficient. Adjustable pressure settings are more common in certain types of gas delivery systems but are not a defining feature of the QUICK CONNECT system itself.