Electronic SOS Beacon Locator KitBeacon complies with all US Coast Guard requirements for "Night Vision Distress Signals" as found in the Code of Federal Regulations: 46 CFR 161.013.Flag complies with US Coast Guard Requirements in 33 CFR 175.130 for Daytime Signaling.Features:. Flashes bright SOS distress signal in Morse Code. Duration: Flashes 2x longer than USCG continuous run-time requirement. Brightness: Maintains constant light intensity 2.5x longer than USCG requirement. Light source extends 4" above waterline increasing visibility. Waterproof easy and intuitive On/Off switch. SOLAS Grade reflective tape at waterline. Double O-ring closure. Multiple deployment options - floatable, handheld and hanging. Low battery indicator function - when turned on unit will quick flash for 5 seconds if batteries need replaced. Requires 2 D-cell batteries (not included). Encapsulated micro processor electronics. High impact, high visibility orange ABS plastic unibody construction. Independently