The Adventure Lights Guardian Expedition is a nifty, small and lightweight signal light. Its High Impact Polycarbonate dome houses the omnidirectional light that is visible in any direction from up to 3 miles (5km) away. This little light is extremely durable, withstanding the test of outdoor use including camping, hiking, swimming and travelling. It's fully waterproof, heat-resistant and impact-resistant making it a reliable signal light for almost any situation you can think of. The light will easily attach to your belt loop, backpack, kitbag, boat, paddleboard and almost anything you need. Additionally, it features Adventures Lights patented Reverse Polarity Program Switching technology, which allows you to change between a flashing light to a steady-on mode by simply flipping the battery over.