NO SHOCK, NO SPIKY PRONGS - The GoodBoy Mini Anti-Bark training collar is an efficient behavior modification tool that will help you train your dog to bark less. Using a progressive correction stimulus, the device creates an association your dog will understand. Best results are achieved by following specific training advice from the user manual pages 15-17. Free of spiky prongs, it presents no risk to the health of your dog. SUITS ANY MEDIUM, SMALL OR TOY BREED - The adjustable training collar from GoodBoy is the best collar for small and medium dog breeds. It's tinier, lighter and more comfortable than other collars and fits any dog's neck from 5 to 19 inches, making it an ideal excessive barking deterrent for all dogs over 6 lbs. UPGRADED IMPACT - Our collar is specially designed to efficiently and safely change barking behavior in small and medium sized dogs. The combined noise and vibration creates a consistent pattern your dog understands intuitively. Dogs are quick learners - once they realize they can avoid the annoying beep and buzz they stop barking. The GoodBoy Mini Bark collar comes with a thorough User Guide. And if you do have any trouble, we're always available for support. WATERPROOF AND SLEEK DESIGN - The sensor and vibration unit is made from a solid piece of durable plastic and the collar has an adjustable strap made from comfortable Nylon. The size and the natural shape, combined with the cute smooth design, make our product the most eye catching training collar on Amazon. RECHARGEABLE - This vibration dog training collar is designed to last and the collar can be easily charged with the charging cable, included in the package. So, no more extra cash spent on batteries - just plug and play.