1[Efficient] Dog bark deterrent device using a one key operation, emitting ultrasonic waves can make dogs and cats unbearable, more serious when dogs and cats approach, so that dogs feel inappropriate and leave. 2[Training Tool] BEEP mode can be used for dog training instruction. For example, each time you press the BEEP button to call your dog, you can give a reward. After several uses, the BEEP sound becomes a call to the dog. 3[For Animals Only] The dog bark control device can produce strong stimulation (inaudible to human ears) for dogs and cats, producing uncomfortable and unbearable disturbance to the animal. 4[Premium Material] Ultrasonic dog bark training device using high temperature resistant materials, ABS materials plus flame retardant materials, safe, strong and durable to ensure that the product works properly. 5[Compact And Portable] Handheld small dog bark stopper, easy to carry, mainly used to prevent being attacked by dogs when you going out. Also convenient to train them outdoors to behave well in public.