Radial space extension is achieved through the standardized docking mechanism at the mid-body section, significantly expanding the robot's central payload area and capacity. Without altering the overall profile height of the robot, this design provides a customizable horizontal mounting platform.

The cargo box can autonomously attach and release with zero external actuators required, achieving an unmanned logistics loop with true "Drop-and-Go" efficiency.

Supports multi-box stacking along the body's longitudinal axis, allowing multiple D1-Set BOX1 units to be stacked vertically at the mid-body mounting position.