Adjustable FrequencyDifferent dogs respond to different frequencies. Our dog training tower has a groove and a screw to adjust the frequency when you rotate it. Note how your dog responds to each of your dog's settings for the strongest response Easy Dog TrainingIt is a great tool to help you train your dog and learn basic skills. Train your dog with an ultrasonic whistle so you don't need to bark too much. Effective Dog Training: Your pet can burn your dog up to 25 feet away, even if the dog can't see you! Train your dog with different commands to follow your directions. (sit down, paw, lie down, get up, heal) Anti-lostThe dog leash body is made of coated stainless steel with a protective eye shield to prevent dirt, damage, and accidental closing. It's super easy to hang around your neck with our matching black lanyard..Items from Sheng Xinshun's shop