If you enjoy boating at night, keep you and your crew prepared for on-the-water emergencies with the Sirius SOS Distress Light, Flag, and Whistle. This setup includes the Sirius SOS Distress Light, a powerful beacon that acts as an incredibly effective alternative to dangerous pyrotechnic flares. Its omni-directional, high-powered LED light is so powerful, it can be seen by surface rescue craft and aircraft flying overhead. Its improved flotation-enabled design has it setting higher off the water, which creates a distress signal that can be seen from up to 10 nautical miles away. Powered by a high-performance, programmable microprocessor, the Sirius SOS emergency light flashes out an SOS flash pattern that lasts for up to 60 hours that's 4 times longer than USCG requirements. This emergency light comes with a lanyard, and it runs on 3 C batteries (included). This boating emergency signal kit also includes an orange distress flag that is perfect for signaling help during daytime emergencies, and a high-quality marine whistle that meets with USCG audible signal requirements. Keeps you prepared for on-the-water emergencies Sirius SOS Distress Light effective alternative to pyrotechnic flares Omni-directional, high-powered LED light Flotation-enabled design set light higher off the water Can be seen by surface rescue craft and aircraft flying overhead Visible from up to 10 nautical miles away SOS flash pattern lasts for up to 60 hours High-visibility orange distress flag for daytime emergencies Marine whistle meets USCG audible signal requirements