Nite Dawg dog collar. Ideal for use at night to keep sight of your dog. Lightweight but durable collar houses a flexible, light-transmitting polymer core that illuminates when the collar is turned on. A reflective stripe adds additional safety by providing passive reflectivity. Powered by an efficient 100,000 hour LED (light emitting diode) which is visible up to 1000 feet in the dark. Includes a long-life, easily replaceable 3 volt lithium battery. Features a glow mode (battery run time 75 hours) and flash mode (battery run time 100 hours). Strong metal D-ring, quick release buckle, and weather resistant push-button switch.