【Effective Dog Whistle Training】silent dog whistle is designed for efficient dog training, helping you teach commands like sit, stay, and recall. The ultrasonic sound grabs your dog's attention without causing harm, making training sessions more productive and enjoyable 【Ultrasonic Dog Whistle】This dog whistle emits a high-pitched sound that is almost inaudible to human ears but highly effective for dogs. It serves as a reliable tool to reduce excessive barking, ensuring a peaceful environment both indoors and outdoors 【Adjustable Frequency】The silent dog whistle features an adjustable frequency, allowing you to fine-tune the pitch to suit your dog's hearing. This customization ensures that the whistle works effectively for dogs of all sizes and breeds, making it an essential tool for any dog owner 【Durable and Convenient】Constructed from robust plastic and copper, our dog whistle is built to last. The 2-pack includes one black and one white whistle, each with a lanyard for easy carrying. The detachable design allows for easy cleaning, ensuring long-term use and hygiene 【Versatile Dog Barking Stopper】Whether you're at home, in the park, or on a hike, the silent dog whistle is a versatile tool for managing your dog's behavior. Use it for recall training or as a barking deterrent, ensuring your dog responds promptly to your commands even from a distance