Small, practical LED lanterns that are easy to take along on all kinds of water adventures. Designed for emergency use on sailboats, fishing boats, inflatable rubber boats, kayaks, and diving buoys. Starboard, port and aft lanterns with three light modes: Solid, flashing, and slow flashing. Battery life: < 50 hours. Powered by lithium batteries: 2 x CR 2032 (included).