The HYDROSTAR SOS SEASTAR DELUXE is a full-function light that is a great addition for any paddler or boater, offering everything you need for lighting in one compact, waterproof package. Use the flashlight setting for shore landings at night or as a 360º viewable white light for paddling. Switch to a red/green setting to use as an auxiliary boating light or switch to the super bright 1 watt LED strobe or S.O.S. signal for emergency use. An integrated clip allows for quick attachment to a PFD; a safety whistle is built in to the lanyard snap hook and the base of the light is magnetic for additional mounting options. 3 AAA batteries included.