This SDU 5/E strobe distress light survival signal is a must-have for any military enthusiast. This original item is a perfect addition to your collection of militaria. The light comes with a case and is untested. The strobe light is designed for use in personal field gear and is perfect for signaling purposes. The item falls under the category of current field gear and is a unique piece that will surely impress any collector. The theme of the item is militaria, and it is an original piece that will make a great addition to any collection.