Itery Dog Whistle Pet Training Whistle to Stop Barking Ultra OBEDIENCE TRAINING: Training your dog to follow simple commands by using different whistle blowing patterns, such as sit, come, stay and stop barking Lightweight, easy to carry and use, stainless steel material, durable and practical Adjustable pitch: Adjust to different frequencies to able to find the best sound that suit to your dog and make you train your dog more easily. Notice: This whistle is not competely silent, you can hear the sound when your blow it Package included: 2 pcs dog whistles