State and local highways will use Mobile Traffic Boards when they need to have an arrow warning traffic of an impending traffic jam, construction site or other road condition that requires extra caution on the part of the motorist. As with all our products we want you to be able to set up and get going quickly, unlike the traffic you face on the road. This is a fully assembled unit. A 3VDC transformer included along with five feet of our 30 gauge wire if needed. Dimensions are: 7/8" W X 3/4" L X 1 1/4” H
See the arrows flashing on video below.