The high-performance GRZ122 allows connectivity to the Leica SmartAntenna. The reflector is of extremely robust design to survive a topple-over even when the SmartAntenna is attached. The built-in point allows the reflector to be precisely positioned directly on a survey mark. In this position, the prism height is 78mm.

The special arrangement of the six prisms provides a high 3D pointing accuracy of 2mm in all directions.