【Material】The training whistle is made of high quality stainless steel, which is safe and durable. The braided rope is made of polyester. The ultrasonic dog whistle will not affect your dog’s hearing. Ideal for dog training. 【Adjustable Frequency】The precise cut of the dog whistle allows it to reach a finer frequency range that is almost inaudible to humans but can be heard by dogs. Featuring the best and most reliable professional dog whistle on the market, it’s the perfect companion for almost any canine situation. 【Ultrasonic Training Whistle】Our dog whistle stops so reliable barking and helps learn commands and techniques. Suitable for sporting, hunting, herding, working guide dogs and rescue dogs. 【Human Friends】Your dog will receive clear signals and commands with this dog whistle . Clear communication between you and your dog becomes much easier. We strengthen the relationship between you and your four-legged friend. 【Perfect size】 With this small, high-quality whistle you will