Dapols Single post semaphore signals are easy to fit and operate and offer an affordable route to accurately model working N Gauge signals. All signals work on 14V AC/ 12V DC and feature;

Smooth operating worm driven motor tested to 30,000 operations
Working LED lights with coloured lenses
Built in electonics enable automatic reverse polarity after activation. This means push to activate and push to return to normal.
Robust and yet elegant and accurate design
Easy to Install