1Pc HO Scale LEDs Model Post Lamps Tri-Lights Block Signals Railroad Line Layout

For SMD LEDs made. Reference Scale: Suitable for OO/HO scale layouts. 4 wires for each target, the black wire is Common Anode wire, the color wires are cathode wires. ( do NOT use it on 12V DC directly, must wire a 620 ohm resistor with the black wire if use on 12V DC ).