2Pack Dog Whistle, Dog Whistle to Stop Barking Neighbors Dog, Adjustable Ultrasonic Silent Dog Whistle, Professional Recall Dog Training Whistles, with Lanyard

【Stop Dog Barking】: When your dog or neighbor’s dog keeps barking, gently blow the dog whistle, the ultrasonic frequency emitted by the dog whistle can easily attract the dog’s attention and stop barking
【Adjusable Frequencies】: Different dogs respond to different frequencies. Our dog training whistle has a nut and screw that would adjust the frequency when turned. Notice your dog’s reaction to each setting until your dog exhibits the strongest reaction
【Absolutely Safe】: The dog whistles is made of 304 stainless steel. Ultrasound frequencies attract the attention of dogs without damaging their hearing and without any health problems