Lighted Pet Puppy Dog Leash Collar LED Glow In The Dark Light 3 Bright Colors 3 Light Modes for Safety at Night You are able to see your Dog in the dark with 3 modes, durable, nylon, colorful LED Light-Up Flashing Collar Visibility up to 800ft with Satisfaction Guaranteed. - Features Fast Pulses, Slow Pulses or a Continuous Solid Bright Color - Easy "Push Button" to Press to Turn On, Off or Change Flashing modes - Easily Replaceable with 2 CR2032 3V batteries (BOTH included) - Sturdy plastic clasp which hides nicely in the collar, easy to remove to change batteries - Great for evening walks & great visibility for you and people who may not see you - For Small, Medium, Large, or XL Dog sizes. FITS NECK SIZES: S: 13.75" - 17" (13-20lbs) M 15.75" - 19" (20-40lbs) L: 17.75" - 19.75" (40-55lbs) XL: 21.5" - 23.5" (50-85lbs) All sizes: 1-inch wide Glows so bright it even works with Long Haired Pets! Bright Glow at Night! Never lose your dog again, protect your dog, and make them visible at night up to 800 feet! Instructions: Please locate the black battery box at one of the ends of the collar. Remove the plastic film below battery before use (find the plastic tab and pull to remove). Press one of the flat sides for the "Push Button" to operate.