The world's first waterproof, handheld, high-performance thermal night vision camera gives every mariner the power to see like never before. Now you can head out early and come home late without being blinded by marina lights. Whether you're on a yacht, recreational powerboat, or sailboat, you'll see clearly and will navigate more safely in total darkness. Thermal imager can be mounted on your boat or held in your hand. Instant-on action provides images when you need them. Fully submersible enclosure is built to last. Four rechargeable AA NiMH batteries provide 5 hours of continuous operation; camera can also operate on alkaline and Lithium ion AA batteries.