A fair safety warning is like blowing an air horn to a dog. It will scare them to death, but it will not harm them. But don't overuse it. The first time or two they will probably shudder and tuck their tail like you would if someone shot an air horn at you that you weren't expecting. It is when you show encouragement that calm them down, while fixing the behavior. Training assistantsThis is not a panic button. It's a trainer - for you and your pet! A behavior deterrent can't live without a tool of some kind to stop rude, unwanted dog behaviors like jumping, barking, counter surfing, soiling the house, and anything else the little hooligans can get up to. Sound frequency sound waves are unpleasant to a dog's ear and can be used to interrupt or stop behaviors in an instant. More deterrent but safeOur ultrasonic devices are safe to use long-term and cause no negative side effects or hearing damage to pets or people. Our outdoor deterrents are specifically designed for outdoor use, and indoor deterrents are most effective when used indoors. Handheld devicesThere are also ultrasonic peeling control devices that fit in the palm of your hand. These smaller devices are intended to deter your puppy from barking anytime, anywhere. Handheld devices usually come with a lanyard or strap to attach the device to your arm, so they can be easily carried