Eastabile LED Flashing Dog/Cat Collar Lightweight Safety Comfortable Pet Collar Keeping your best friend safe on night walks is essential. Our LED Dog Collar lets your dog be seen at 10,000 feet. It's also pretty eye catching Batteries last 60-80 hours and an extra set of batteries is included. Flashing Dog Collar manufactured to our high standards. Not a cheap collar that will only last weeks. Made of nylon. Sizes shown below in product description Collar is water resistent. This means that it's fine in rain but not suitable for a dog who is hunting or swimming. Collar has 4 modes controlled with a switch on the collar - Solid Light, Fast Flash, Slow Flash, and Off