Pawow Nylon & Metal Durable Adjustable Night Safety Flashing LED Light up Dog Collar, 6 Colors & 3 Sizes LED lighted dog collar lets you and your dog be seen in the dark by cars, cyclists and other dog owners - black dogs especially can be almost invisible at night when crossing a street - don't take chances with your precious pet - protect your pooch on your early morning or late night walks 2 setting modes: blink or stay on, 6 LEDs light on the webbing provides greater visibility than a simple reflective dog collar or tag, 2pcs extra 3V CR2025 button batteries included, you will get about 60 hours of steady light, or over 100 hours of flashing light with each collar Made from two-layer extra tough nylon and part of padded inner lining, wear resistant, fully adjustable metal buckle lets you find the perfect fit for your dog's neck Sturdy metal D-ring allows you to securely clip on leashes, leads or identification tags for your best friend's walk or puppy training session so you can keep your dog safe Length: 24 inch, width: 1 inch, adjust to fit neck sizes from 16.7-inch to 22.0-inch, ideal for medium or large dogs, please remember to allow for two fingers to fit between the collar and the neck