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Bottom layer (for Otis)

Intermediate layer (for Otis)

Top layer (for Otis)

A complete set of outbound call boxes (with a lock on the bottom layer)

The whole set of outbound call box (middle layer)

The whole set of outbound call box (top layer)

Color screen separate display board

Bottom layer (for Express or Unidex)

Intermediate layer (for Speedy or Unidex)

Top layer (for Express or Unidex)

LMBND430DT, HBP12 single ladder, HPI-B0430VR-1-B are the same and can be used in general.

Otis and Speedy, Unidex are not interchangeable, please purchase accordingly.