Detailed Product Description electronic street sign 1Uniform illumination,excellent visibility 2Resin front,LED inside(CE,R ... , view distance > 2000m in the night3.Good texture, neat edge.No maintenance expense.Maintaining clear with just water washing.4.High ... for pressure,strike,water,sour,alkali.5.Environmental protection: have no light pollution or chemical pollution6. Energy saved: Low in power ...