Pet Blinkers ™ are small, virtually weightless and easily removable safety lights that can be clearly seen at distances up to 1 mile. They are durable and waterproof and come in a variety of color combinations . Pet Blinkers keep you and your pet safe when out at night. Allows you or your pet to be seen long before you are heard. Pet Blinkers can be easily attached to collars, leads, harnesses, key chains, or on your person. Great for pets that are walked at night or for night joggers / bicyclists. Kit includes 1 Flashing Button Light with Stainless Steel Clip 3 AG3 Batteries (installed)