Designed to be attached to a lifebuoy. Must be stored upside down- light activates automatically when facing up in the water. Shows a continuous bright white light while floating upright in water. Operates via a mercury switch. Require 4 x 'D' cell alkaline batteries (not included) to operate the light.
If putting on as a new unit your may require a mounting bracket simply search on 03502 in the search box at the top of the page.