Buyers Products Portable 4 Inch Wide LED Beacon runs on two D batteries and can be used for multiple applications, such as roadside and personal visibility. Available with amber or red colored LEDs, the beacons feature a magnetic base and carrying strap. Beacons can be operated via the automatic light sensor or a standard on/off switch. An optional galvanized mounting bracket is available. Lights are backed with a 5 year warranty.