Features:Single 3-color red/green/yellow traffic lights.Lights include red, green and amber bulbs.Prewired quality products.Black wire is for positive, the other three are for negative.Each line corresponds to the color of the glowing colors, the green line is the green LED, the red line is the red LED, the yellow line is the yellow LED.You can also connect with 5V transformer without circuit board, black wire with positive, and the other three with negative.Great accessories for diorama, buildings, train models.Specifications:Voltage: 5VCurrent: 60MAPower: 0.36WMaterial:Plastic, steel pipeApplication: Construction sand table model / DIY materialsTraffic Signal Size:76x68mmCircuit board size:19.1x18.5mmPackage Included:1x Traffic signals1x Circuit boardNote:Please allow 1-2mm errors due to manual measurementItem color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.