The Streamlight Stylus combines the convenience of a penlight with the power of high intensity LED. It is tough, durable, waterproof, and safety rated. The Streamlight Stylus is perfect for reading a map, camping, inspecting hard to see places, forensic investigations, tactical law enforcement operations, and military and police work. The Streamlight Stylus is UL Classified for Class I, Division for use in hazardous location with the presence of flammable gases, liquids, and vapors. Red LEDs will not destroy your night vision when working at night, provide contrast, cannot be seen by other people from a long distance so you can stay concealed, used in night time photography, used with night vision goggles and other night vision optics, and red LEDs also help with reading in low or no light situations.