Nothing beats the Original! - Pet Blinkers ensure you and your pet will be seen in darkness and low visibility. Designed to be compact and inconspicuous, each Pet Blinker’s LEDs emit a bright flashing light that can be seen up to a half-mile away. Made of light-weight durable plastic, Pet Blinkers are water-resistant and includes a spring-loaded clasp for easy attachment. Pet Blinkers are activated by a simple on-off twist mechanism and are available in four vivid flashing colors. Using two different size clasps, Pet Blinkers will comfortably fit both large and small dog collars, leads and leashes. Pet Blinkers require 3 AG3 batteries (installed), and each includes an extra spare set. Be Seen – Be Safe – Get your Pet Blinkers today! Features: Bright LED’s Can Be Seen Up to a Half-Mile 4 LED Color Combinations – Blue/White, Red/White/Blue, Red/Green/White & Jade/Blue Convenient, Compact & Unobtrusive 2 Sized Clasps for Large & Small Dogs Water-Resistant Easy Twist On-Off Activation