This new combination dive light is extremely versatile, 150' rated, powered by 3AA Battery (not included) combination strobe / flashlight. Strobe and flashlight each have separate battery compartments (1 AA strobe, 2AA flashlight)Burn time is 6 hours for strobe and 2 hours for flashlight. So combined the need to see in dark places with a safety strobe for emergency use or as a night diver locator light, whatever your need this unique light will fit the bill.