The all new LED personal/PFD marker light activates when in contact with salt or fresh water and can be deactivated by sliding the switch to the off position. It is smaller than other approved lights and features rounded edges to maintain air chamber integrity when used with inflatable life jackets. Installation is quick and simple with the all new Dragon Clip™ which provides a secure attachment to almost any style life jacket in a matter of seconds. Single use light has a sealed 5-year battery (not replaceable) with typical operational life of 16 hours. USCG SOLAS Approved.