Push button bus coupler WG AP 1-way with control window and 1-point operation for KNX gray - With 1-point operation (tilted rocker), the rocker can only be operated from one side (bottom). - Push button bus coupler in the water-protected surface-mounted system (IP44). - Functions of the status LED: Red LED can be used as orientation lighting, operation display or status display. Connection and branch terminal for KNX included in delivery.