Light Signal for Railway Make sure all the trains know when to stop to let other traffic through with this light signal for railway. Push the top button to activate the light signal red means stop, yellow means wait and green means ready for new adventures on the BRIO train tracks! Art#: 33743 Specifications Width (mm) 42 Depth (mm) 42 Height (mm) 133 Battery needed yes Battery included yes Number of LR44 batteries 2