SOS strobe. Water resistant. Impact resistant. Rechargeable. LED. One hand output adjustment from 1 to 1000 lumens. Precision reflector produces a smooth, wide beam. Light assembly rotates up and down 90 degrees. Magnesium body with black finish. Built in battery charge level. Fine mesh headband with Breathe-O-Prene pad that fits against the forehead. Aluminum battery end cap. Low profile headband adjustment clip. Detachable red filter included. Requires (1) Lithium battery (included). Boxed.