Nite Ize SpotLit LED is the perfect mini-beacon whenever you need a little help in the dark. Set in a lightweight stainless steel carabiner, it attaches quickly and securely to your pet's collar. It provides instant location of hazards and necessities; it tells people where you are, when they might not otherwise see you. Choose from two modes: press once for steady glow, twice for continuous flash. Water-resistant, long-life, replaceable batteries included.