Make sure your pet is seen at night. The LED Safety Blinker can easily be clipped to your pets collar or lead. They are water resistant and visible up to 1/2 mile. Just turn clockwise to activate. Includes 1 Blinker & Clip, 3 AG3 Batteries (installed). They are also great for attaching to backpacks, pushchairs, wheelchairs, bikes, clothing & lots more.