Designed for personal safety and various applications such as:- diving- fire fighting- marking of personnel- objects- vessels- vehicles- targets- safety - Life Jacket marking. Manually activated. High intensity xenon flash strobe light. Light weight. Waterproof to 300m (option of 500 m). Flash rate: 50 flashes per minute. Operation up to 12 hours at 15°C with decreased flash rate at the end of the battery life. NATO Stock No. 6230-25-138-7110 (standard unit)