Fangrui Product Details Two Side 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 Former Without Circuit Board, Black Wire With Positive, And The Other Three With Negative. Great Accessories For Diorama, Buildings, Train Models Voltage: 5v Current: 60ma Power: 0.36w Color: Black Material:plastic Application: Construction Sand Table Model / Diy Materials Package Content: 1* Traffic Light 1* Control Panel Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.