The Edwards Signaling AdaptaLight Stackable Beacon is a unique audible-visual signaling device which can contain up to 5 light modules and a pulsating horn in a single stack. It is for heavy duty use in locations where visibility over longer distances is required. All modules are gasketed. The base of the AdaptaLight Stackable Beacon contains a pulsating horn rated at 85dB at 10 feet. The horn can be operated as a sixth independent signal or in conjunction with any one of the light modules.