This new, low pro?le light is a single compact ?ashing unit. The light is emitted through a ultra low pro?le dome, making the light less susceptible to damage during evacuation. Easily ?tted with two different backing plates, one to go over a thin strap and one to go over a 5cm belt. This is the automatic version of Dan M3. The light activates automatically when in water and can be turned off manually if required. All Daniamant Lifejacket lights are designed to deliver, as a minimum standard, the 0.75cd output specification and 8 hour duration required by IMO SOLAS regulations.