Ideal for viewing plants at night without disturbing their growth cycle. The lightweight compact Green Eye™ Headlight easily adjusts with its elastic band and tilting light mount. Ultra bright LED bulbs with 100000+ hours of burn time. Customize your lamp settings with one click of the button. The settings are 4 lamps 8 lamps all lamps and flashing. Water resistant. Allows hands-free tasking. Uses three AAA batteries (not included). Uses one AAA battery (sold separately).