70 mm signal towers:

Up to seven modules of the following can be stacked to create a signal tower:

1. Up to seven light modules (blinking or steady), less one if a sound module is needed.
2. Include a connection module for ending.
3. If necessary, add mounting attachments.

• Modules for lights: continuous light, flickering light.
• Sound modules: either pulsating or continuous audio.
• LED (not included) or normal BA15d lamp filament used in steady light modules.