" 7 seconds of high-pitched ultrasonic waves (inaudible to humans, but dogs) that are very uncomfortable for the dog (no harm to the dog). After many repetitions, the dog will build up a conditioned reflex and know that this sound wave caused by his own barking, and then he will no longer bark easily. Huzai J-1302 uses the trigger method of sound accumulation (integrator circuit), that is, a single dog bark or short noises in the environment will be not triggered. Under normal circumstances, only three consecutive dog barks will be triggered, so it is effective. Filter false triggers caused by ambient noise or the occasional dog bark. But because of the Uncertainty about the surrounding noise, the size of the dog’s voice, the dog’s distance from the machine. The so-called “triggered by more than three consecutive dog barking” is not safe, but does not affect the use effect. Since the J-1302 needs to be left on for a long time, the battery needs to be replaced frequently if the battery
