Keep your dog visibility and safety, cars will see your dog well in advance with this bright collar. Excellent quality nylon collar manufactured to our high standards. USB rechangeable battery(cable included), the rechargeable battery provides 5 hours of illumination per hour of charge. Collar has 3 modes controlled with a switch on the collar, Solid Light, Fash Blink, Slow Blink. It's well-constructed and sturdily built.Can be used for a long time.