A combination high intensity emergency strobe and flashlight.  Omni-directional, xenon strobe is visible up to two miles, and flashes 40-60 times per minute with an operational life of 10 hours.  Flashlight with krypton lamp provides 2 hours of continuous operation.  Uses two (2) AA-cell alkaline batteries (not included).  Case is waterproof to 100 meters and floats.  Measures 5.3" length x 1.5" diameter & weighs 5 oz.  

Batteries:
#422-AA  Alkaline Batteries, AA
#428       Lithium Batteries, AA