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 CodeDuration: Flashes 2x longer than USCG continuous run-time requirementBrightness: Maintains constant light intensity 2.5x longer than USCG requirementLight source extends 4" above waterline increasing visibilityWaterproof easy and intuitive On/Off switchSOLAS Grade reflective tape at waterlineDouble O-ring closureMultiple deployment options - floatable, handheld and hangingLow battery indicator function - when turned on unit will quick flash for 5 seconds if batteries need replacedRequires 2 D-cell batteries (not included)Encapsulated micro processor electronicsHigh impact, high visibility orange ABS plastic unibody constructionIndependently tested by US Coast Guard Approved LabPacked in a reusable storage containerUSCG Approved orange distress flag (included)WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.