Nite Dawg dog collar cover. Ideal for use at night to keep sight of your dog. Durable, weather-resistant, and lightweight. Low-profile, flexible LED (light emitting diode) illuminated strip fits comfortably over almost any collar and closes securely with 2 micro hook-and-loop tabs. Bright, light-transmitting polymer core is illuminated by an efficient red LED bulb with 2 mode settings - flash and steady glow. Visible up to 1000 feet in the dark. Powered by a long-life, easily replaceable 3 volt lithium battery (included). Glow mode battery life: 75 hours, flash mode battery life: 100 hours.