Our 4000 Series Strobe Beacon is perfect for DOT, Construction, commercial vehicle fleets & school buses. The 4000 Series Beacon has sturdy cast aluminum base with an optically superior Double Fresnel polycarbonate lens designed to withstand demanding weather conditions. Remote & Self-contained models are available. No need to worry about CA Title 13 requirements; use our Clear Dust Cover (# E36ØDC6) to comply. Beacon has a 1 Year No Hassle Warranty.