[High Quality Dag Whistle]: Our dog whistle is made of high quality stainless steel, 100% safety, strong and durable. Ultrasonic dog whistles will not harm your dog’s hearing Very suitable for training dogs. [Ajuatable Frequency]: Our ultrasonic dog whistle trains dogs to perform different actions by producing sounds of different frequencies. can slowly train the dog to become familiar with the sound and perform corresponding actions. [Easy to use]: By adjusting the nut and tuning lever to make sounds of different frequencies, observe the dog’s response to each sound for better training. [Train Multiple Movements]: By using our dog whistle, you can make your dog do the corresponding action without shouting loudly. For example: stop barking, sit down, shake hands, remember, etc. [Anti-lost design]: Our package came out with 3 whistles and good quality lanyard. It can be hung around the neck and will not disappear due to its small size. Product description Product dimensions (L x W x H)