High quality Construction: 4 pack pen flashlights are made of anodized machined aviation aluminum, which makes them not wear out over time and can withstand drops and bumps. Perfect for working, repairing, camping, emergency survival, mechanics, nurses, doctors, and outdoor sports Super Bright: Each pen light is equipped with 1 super bright LED and can last up to two hours with only two alkaline batteries (battery included), please remove the red insulating sheet before use. Lights up your paths and small dark spaces for a long time