Battery operated for cordless use Brilliant LEDs last 50000 hours 18 in. bendable neck with 1 in. mouth stainless metal mounting clip 3 AA Batteries included. This handy portable light features 4 brilliant LED bulbs which last 50000 hours. Uses just 3 AA batteries (included) to provide convenient lighting anywhere. Energy efficient design yields double the battery life of other lights! Typical life 4-6 hours continuous a whole summer with intermittent on/off operation. Clip the light onto any shelf up to 1 in. thick and bend the gooseneck to the desired angle. Stainless Steel housing and mounting clip useable rain or shine outdoor and salt-spray tested.