Waterproof and impact resistant, this is the light that Danish search-and-rescue teams rely on to keep their dogs visible in dark and dangerous conditions. The low-profile LED fastens anywhere on your dog's collar via a clip or hook-and-loop strap (both included, and can be switched on simply by rotating the lens. Steady and flashing modes. Waterproof to 330 feet. Lithium CR2032 battery. 100, 000-hour bulb, 250-hour battery life. Imported. Weighs less than 1 oz. LED Safety Dog Collar Light Clear Orvis