This is a HO scale modern 4 head cantilever 2 track left hand signal bridge that is plastic. This signal is based on common prototype signals, durable construction and is fully assembled, operating signal heads and is highly detailed. This signal has micro LED lights and requires no more than 2.0-2.2 volts or 25-30 milliamps. This should be used with a Atlas universal control board. Use with other brands may require addition resistors to ensure proper operation. The signal is made by Atlas Model Railroad Co. in 2021.