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