85-4071A & 85-4075A Revere See-Me LED SOLAS- and USCG-approved light's, these emergency lights use long lasting digital LED technology – no bulbs to break or burn out! They turn on automatically and are microprocessor controlled to maximize brightness and run time, exceeding USCG requirements (96 hours w/ lithium batteries) for light output and duration. Features a tough, waterproof polycarbonate plastic case. Uses (2) AA alkaline batteries for USCG approval or (2) AA lithium batteries for SOLAS / USCG approval (batteries not included).