The PetSafe Deluxe Little Dog Bark Control Static Correction Collar is the smallest bark control collar available, perfect for the little dogs. The collar features patented Perfect Bark™ detection that uses both vibration and sound to detect your dog’s bark. This unique feature ensures only the dog wearing the collar gets corrected. Sleek and comfortable, the molded collar is designed for an active small dog. The collar is also equipped with our Temperament Learning System that automatically and incrementally adjusts the correction based on your dog's barking pattern.