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 tested by US Coast Guard Approved Lab Packed in a reusable storage container USCG 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.