- High-Quality Construction: This pet whistle is crafted from durable, environmentally friendly plastic and chrome-plated metal, ensuring reliability and long-lasting use without compromising your dog's hearing. - Adjustable Frequency: Tailor the whistle's ultrasonic frequency to your dog's unique needs by easily adjusting the nuts and screws. A longer screw produces a stronger sound, helping you effectively manage your dog's obedience and barking. - Ultrasonic Silent Technology: Utilizing advanced ultrasonic technology, this whistle emits sound waves that can be heard by dogs from three to four kilometers away, while remaining inaudible to humans. This feature is ideal for training your dog in obedience commands such as sit, stay, and come. - Portable and Convenient: Compact and lightweight design makes it easy to carry. Wear it around your neck or attach it to your gear for effortless access during outdoor training sessions. Use Scenarios: 1. Ideal for training sessions in parks, allowing you to communicate effectively with your dog at a distance. 2. Perfect for obedience training at home, helping reinforce commands without disturbing your household. 3. Great for outdoor adventures, ensuring you can guide your dog safely and effectively in open spaces. Experience the benefits of effective dog training with this practical, user-friendly pet whistle.