Dogs are amazing pets to have around. But they do bark once in a while. Keeping your pet quiet won’t be too hard when you have a Bark Deterring Ultrasonic Collar. It uses ultrasonic sound to make your dog quiet without harming it. It has a built-in microphone that detects the sound. Once the unit recognizes dog barking, it emits a high-pitched tone that is inaudible to humans. This could help you train your dog to behave. It works for dogs 8 lbs. and up.