7 1/4" overall. Reflective material for on-going visibility and personal safety when light is turned on. Flexible, lightweight design. Red LED is visible over one mile. Three modes: flash, glow, or off. Adjustable band may be strapped to arm or leg and fits from 11" - 18". Perfect replacement for chemical light sticks. Water resistant. 200 hour replaceable battery included. Hang packaged.
