Road and Traffic Signs descriptions: We use raw materials, all materials are very suitable for the product, please rest assured to buy. Dc12v/ Dc24v Red Cross And Green Arrow Led Traffic Lights. Features: The Wire Connection is :common Positive Anodeand   Application : Use for School Teaching ,as a Mini Toy  gift , Good for Decorations Specifications: Name:  125mm LED Traffic Light Module LED Color  :Yellow Lamp Diameter  :125mm LED Luminous:  green :500-505nm Wave Length :green : 8000-10000mcd Life Span:  3-5 Years   NET Weight:  0.35KG Visual Angle :  30 °C Visual Distance :  500m Warranty :  2years Working Temperature:  -40- and50 . Products number : SOMONO162982 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.