This collar is unbeatable with construction with super bright L.E.D.s. It has 3 different light modes for complete visibility. Keep you and your pet safe at night. You will be seen for up to 1000 feet away. Beautiful! Strong & soft, lightweight. Fully adjustable. A Comes with 2pcs CR-2032 Coin Cell Batteries which are replaceable. Be seen and shine on!

• Small- fits 12.5"-15.5"x1"
• Medium - fits 15.5"-19.5"x1"
• Large - fits 19.5" - 24" x 1"
• Batteries laser over a year under normal use.