The PetSafe Bark Collar Control Dog is designed for dogs weighing 8 lbs and up, with a neck size ranging from 6 inches to 27 1/2 inches. This collar uses static/shock correction with 15 different levels to help control barking, making it suitable for all breeds. With a trusted brand like PetSafe and customer service from Petmoods available to assist, this bark collar is an effective tool for training and obedience.