Keep outdoor dogs and cats safe with our Flashing ID Tags. Two-inch, pawprint-shaped tag contains twin, bright-flashing LEDs that are triggered by a combination of movement and darkness. Constructed of durable, reflective plastic, so pets are visible even in nighttime traffic. Water-resistant tags are great for camping, night-jogging, or walks. Auto on/auto off activation ensures long battery life. Powered by a replaceable 3-volt lithium battery (included). Includes a low-battery indicator light. Attaches easily to virtually any collar.