Dog owners, this 2-pack of ultrasonic whistles might just be your secret weapon for training and quieting barking! The adjustable frequency is genius - different dogs respond to different pitches, so you can twist the nut until you find the setting that gets your dog's attention. The ultrasonic sound is silent to humans but clearly heard by dogs, making it perfect for training without disturbing neighbors. Made from 304 stainless steel, these whistles are built to last through plenty of outdoor use. The range is impressive too - up to 1000 meters means you can recall your dog from quite a distance during off-leash activities. They come with handy lanyards so you can keep them accessible around your neck or attached to your gear. Whether you're dealing with excessive barking (yours or the neighbor's dog), need better recall control, or want to teach basic commands, these whistles give you consistent communication with your pup. They work with all breeds - Labs, Goldens, Shepherds, you name it. The best part? They're completely safe and won't harm your dog's hearing. Having two means you can keep one handy at home and one in your car or backpack. For the price, it's an incredibly effective training tool that actually works!