Ocean Signal EDF1 LED Electronic Distress FlareThis Ocean Signal rescueME EDF1 marine flare is an affordable and effective way to call for help in an emergency situation. The flare is visible up to 7 miles away and will display at a consistent brightness for up to 6 hours. rescueME EDF1 is an electronic flare and you can easily replace the battery yourself. The device has four modes of operation plus the SOS function. The LED technology provides 360 degree visibility in the Azimuth. This ensures