Using wide light emission LEDs, the Firefly PRO strobe cuts through the foulest conditions, creating a super-bright flash visible for over 3 miles. With 3 activation functions, the unit offers an ultra-bright strobe light, SOS strobe to visually alert Search and Rescue of your location, and Steady-On mode for closeup recovery operations. The cool white color of the LED strobe has no yellow tint which allows the light to be seen at greater distances. With the microprocessor and energy-efficient electronics, the Firefly PRO operates continuously for over 56 hours. Steady-on mode aids during recovery operations Energy-efficient design operates over 56 hours | ACR FireFly PRO SOLAS Strobe in Yellow