Tested and confirmed working. Can illuminate your surroundings or send signals to people far away. Batteries are included, so you can use it immediately. This is a signal light with color filters that was used by the German Federal Army. It was used not only to illuminate the surroundings during operations at night or in dark places, but also as a means of identification and light signals between comrades using two-color filters. A clip is attached to the back of the main unit, allowing it to be attached to a harness or belt. #MilitarySurplus #SnowPeak #Coleman #Logos #CaptainStag #TentMarkDesign #Nordisk #Ogawa #DOD #WAQ #Helinox #Yeti #Ballistics #Halftrack #NatalDesign #Camping #SoloCamping #Mestin #Trangia #Dietz #FEUERHAND #Camping #SoloCamping #Bonfire #Gear #CampingGear #Accessories #FrenchArmy #MilitarySurplus #GreaseCase #MilitaryTent #TentMark #Camping #PolishArmy #Poncho #OnePole #Tipi #Tent #SoloCamping #WinterCamping #Alone #WoodStove #Bonfire #Camping #Bushcraft #bushcraft #pup #PupTent #Hiroshi #Davidson #Norway