Other Functions
Some mechanically powered flashlights include additional functions and features beyond just a source of light. Models sold as emergency lights have additional functions useful in emergencies, such as flashing red or yellow lights for roadside emergencies, sirens, and AM/FM, weather or shortwave radios. They may also include alternate means of charging the battery, such as solar cells, or cords that plug into a car cigarette lighter jack.
The quality and long-term reliability of these devices vary over a wide range, from high-reliability mil-spec emergency equipment down to one-time-use non-repairable throwaways.
Read more about this topic: Mechanically-powered Flashlight
Famous quotes containing the word functions:
“Empirical science is apt to cloud the sight, and, by the very knowledge of functions and processes, to bereave the student of the manly contemplation of the whole.”
—Ralph Waldo Emerson (1803–1882)
“When Western people train the mind, the focus is generally on the left hemisphere of the cortex, which is the portion of the brain that is concerned with words and numbers. We enhance the logical, bounded, linear functions of the mind. In the East, exercises of this sort are for the purpose of getting in tune with the unconscious—to get rid of boundaries, not to create them.”
—Edward T. Hall (b. 1914)