This work light is manufactured with COB (Chip on Board) LED’s which are the most recent development in LED technology using chips with multiple diodes (typically 9, or more). There is no casing with COB technology which enables a much denser LED array of light compared to SMD. The light is manufactured with a flexible hook & powerful magnet making it ideal when working on your car, in a garage or anywhere light is limited. It requires 3 x AA batteries which are not supplied.