Effective Dog Bark Control Trainer with Adjustable SettingsGet a quieter home and train your dog effectively with the QuietPaw Pro Ultrasonic Bark Trainer. This safe and humane device lets you customize the sound to your dog's sensitivity for the best results. Say goodbye to constant barking and hello to a more peaceful life! What You'll Love High frequency sound that's inaudible to humans, so you won't be disturbed Adjustable frequencies (15kHz, 20kHz, and 30kHz) to tailor the sound to your dog's needs