Ultrasonic Anti-Barking Device 3 Levels Dog Barking Control Device Dog Deterrent
It has 3 adjustable ultrasonic frequency levels including 30KHz for small dogs, 20KHz for docile dogs, and 15/30KHz for large dogs. -Adopting ultrasonic sound, non-toxic, chemical-free, safe to use, your dog can hear it but will not be hurt.