The FlareAlert Beacon is a highly visible electronic safety beacon that utilizes high output LEDs to provide a safer, more cost-effective alternative to strike flares. No more flames to burn uniforms or risk roadside fires and no more noxious fumes. The compact, lightweight design is both weather resistant and crush proof enough that you can drive a 20,000 lb vehicle over it. Use the magnetic base to attach it to a vehicle to provide a safety light without draining the vehicle’s battery. Powered by four AA batteries, the 1 watt LED will last 30 hours on the flash mode and 10 hours on the steady mode. Diameter and height: 3-3/4 x 1-3/4 in (9.5 x 4.4 cm) nWeight with batteries: 8 oz (227 g) nBatteries not included. Use FlareAlert Beacons for: Lane Closures Marking Evacuations Routes Marking Road Hazard Helicopter Landing Zones Lighting Traffic Cones Marking Disabled Vehicles Identifying Entry or Exit Points. . Working-At-Height / Industrial Rope Access / Technical Rope Rescue nWorking at height requires reliable, quality equipment. The FlareAlert Beacon can be used with confidence in work-at-height maneuvers for industrial rope access or technical rope rescue when used in accordance with the regulatory safety standards it falls under. Always use life safety equipment and gear according to the regulatory safety standards for which it is classified and/or certified.