This kit consists of two LED UV / White flashlights with battery holders, AAA Alkaline batteries, 18650 LiIon battery adapter tubes, wrist straps. They are made of aluminum alloy with black finish. They can be focused in and out. They are good for checking currency for counterfeits, checking carpet for animal urine, fungus, etc. In addition, you should have one of these in your automobile, you never know when you may need a good flashlight.