Automatic Block Signal System (ABS) for Uni-directional or Bi-directional 2, 3 or 4 aspect signals. This is a combination block detector and led aspect controller. The two magnetic reed sensor switches provided are mounted vertically and centered below the track each end of the block. The block signal is activated by one (1) or more magnets below each rolling stock. This method works at any train speed and any train length.

Z Scale to G Scale.
Stand alone system. Not wired into the track.
True Prototype behavior.
Optional digital counter displays the number rolling stock in each block.
No insulated rail gaps or resistor wheel sets required.
No computer.
No push button programing.
No soldering.
No adjustments.
Any train speed.
Any train length.
Night time operational.
Sunlight operational.
Choose screw or plug-n-play wire connectors.
Two water proof block sensors included.