... , one fast flicker red warning light, and one normal flicker red warning light, can be used as SOS signal.Type B: It is ... white lightone, and one fast flicker white light,can be used as warning signal.can be replaced Type A within 2 different ... , rubber undercarriage, cylinder, box, cartonPictures:Exploded drawingDimensionsUsingProducing and testing: portable led traffic signs----2013 new product