Which feature is prominent in both the MB-1 and MB-2 devices?

The feature that is prominent in both the MB-1 and MB-2 devices is the quick release lever. This lever is an important component designed for ease of use, allowing for rapid engagement and disengagement. In air transportation, where efficiency and safety are paramount, the quick release lever facilitates prompt actions, such as securing and releasing cargo or equipment, which can be critical in emergency situations or during routine operations.

The usefulness of this feature is underscored in various scenarios where speed and accessibility are necessary, contributing to both operational efficiency and enhanced safety. Other features, while beneficial, may not be universally present in both devices, making the quick release lever a defining characteristic shared by the MB-1 and MB-2.