The all-new Firefly PRO Waterbug is a SOLAS-approved strobe light with a built-in water activation feature that will automatically activate once submerged.With 4 activation functions, toggle between the armed mode for automatic water activation, ultra-bright strobe light or the SOS strobe to visually alert Search and Rescue of your location, then toggle to the Steady-On feature for close up recovery operations.The remarkable cool white colour LEDs produce a 360C beam of light that is over 41 candelas bright allowing for visibility of over 3.5 miles.With the all-new microprocessor and energy efficient electronics, the Firefly PRO operates continuously for over 56 hours, that's 48 hours longer than SOLAS/USCG regulations and twice as long as competitors.The cool white colour of the LED strobe has no yellow tint allowing the light to be seen at greater distances.