- The Atlas O 21st Century Signal System represents a quantum leap in model signal operation and design. These realistic signal structures provide prototypical operation with red, green and yellow aspect.
- Each trackside relay shed has a signal circuit board capable of 4 modes of operation: stand-alone, integrated, approach-only, and complex signaling.
- Signal structures have true 1/4" scale dimensions and details.
- Does not require external relays.
- Detailed installation and operating instructions for completely integrated operation.
