The ACR Electronics ResQFlare LED Electronic Distress Flare delivers brings a high-tech, high-intensity design to help you when you need it most. The ResQFlare provides 360 visibility for more than 6 miles, and its efficient design allows for substantial operational life (the equivalent to traditional burn time), drastically increasing your chances of visibility, rescue, and survival. The ResQFlare emits the flash characteristic for the International Morse Code for S-O-S. Running on 2 user-replaceable C batteries (not included), this rescue flare emits its fixed intensity for more than 20 hours, more than 3 times longer than the USCG requirement for maintaining this level of light intensity. Includes a daytime distress flag, collectively meeting USCG requirements to replace traditional pyrotechnic flares in the US. 360 visibility for more than 6 miles for more than 20 hours Family-safe: no burning flame Easy to operate Waterproof Buoyant