Dog-E-Glow Product Features: Safety and Visibility! Flexible LED tube sewn into each collar allows this dog collar to look good in the light and at night! Plus, it feels like a normal collar. The easy-to-use Push Button technology comes with two settings: 'Constant Lights On' and 'Blinking'. When collar lights are on, collar is visible up to 1000 ft in the dark with 100,000 hours LED life! Batteries and replaceable batteries are included. This highly durable, lightweight collar is also weather-resistant. Pair with the Stars and Stripes Flag Lighted Leash for a patriotic walk in the park!