Alldaymall F-491 Wf-501B Cree Q5 Single Mode 200 Lumen LED Flashlight, Red Light Color BIN: Red Common uses: stargazing, hunting with a night vision scope, or military operations It may still be used during the day for signaling, reading maps, and other tasks Battery Configuration: 118650 battery (not included) Adopts efficient constant current output circuits, water resistant design