The Beacon from Ruffwear is a bright LED dog light designed to keep dogs visible in low-light conditions. The high-intensity LED is made with a light dispersing lens to provide a hemisphere of light. Three light modes give you multiple dog tracking options: slow flash, fast flash, and always on. This dog-tested light is sturdy, compact, watertight, lightweight, and effortless. Easily carry the Beacon thanks to the Quick Ring and integrated clip. Able to attach to a variety of gear, such as collars, packs, apparel, life jackets, and harnesses so you can take the Beacon with you anywhere. For additional safety, it also clips to runners, hikers, cyclists, kids, and equipment. Includes CR2032 coin cell batteries.