Great-Dealz LED dog Collar to Keep Your Dog Safe  &ndash; Flashing Dog Collar with Extra Batteries This collar is 1 inch wide and neck sizes are Small (11-15 inches), Medium (15-18.5 inches), and Large (18.5-23 inches). This collar is too heavy to be suitable for miniature breeds Batteries last 60-80 hours and an extra set is included. Batteries are standard CR2032 button batteries. Lighted collar can be seen for up to 1,000 feet. Collar is water resistant. This means that it is fine in the 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, Fash Blink, Slow Blink, and Off Excellent quality nylon collar manufactured to our high standards. Not a cheap collar that will only last weeks.