Upgraded Dog Trainer and Barking Control Our 2024 upgraded dog bark deterrent devices both three adjustable modes. Equipped with a specially designed enhanced ultrasonic gear, it meets more training needs and Train your dog in good behavior, stop clawing, digging, scratching, biting, and staying off the furniture. Safe and Effective When our dog bark deterrent device is turned on, it emits a frequency of 10kHz-30kHz, which is difficult for human hearing, but it is a sensitive frequency for dogs. The sound will not bring negative effects on the hearing orhealth of dogs. lt is an effective and safe product Multi Function Dog Bark Deterrent Device The barking dog silencer ranges up to 33 feet and can not only prevent the barking but the anti bark device for dogs to stop barking the front also includes super powerful LED lights and laser light. Which can stop the dog's aggressive behaviour at night and always tease the dog. Easy Steps to Calm Down Dogs First, tapping beep button once the dog barks. One that you can use as a warning. Then, tapping sonic button if the dog ignores beep warning, you can change fixed/variable frequency mode when one gets used to it. (Remember to praise for not barking). Easy to CarryOur dog barking silencer with small size, It is handheld with an adjustable anti-static wrist strapand. Easy to carry wherever you go. Such as walking, jogging, picnic, cycling, and so on. works on dogs from ages 6 months to 8 years. This is a blanket age cover and works on almost types and breeds of dogs.