The TAG-IT "clip-on" light is a versatile dual function safety light. Ideal for camping, hiking, everyday walks, or for additional safety when cycling. Like most of our other products, this light is impact resistant, waterproof, lightweight and long lasting. It is powered by 2 CR2032 coin cells and will operate in strobe mode for up to 250 hours. This model does not work with any of our other accessories and is not intended for use on pets.