Adjustable elastic headband holds light comfortably in place on your forehead . . . projects a powerful beam of light right where you need it. Function switch controls the output of the 4-beam bright-white LED lamp; you choose between off, half-power or full-power. Keeps your hands free to work. Light output: 13000 mcd (equivalent to 13 candlepower). Light weight plastic body; color may vary. Requires three AAA batteries (not included).