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Pet Dog Anti Barking Device Waterproof Ultrasonic Stop Barking Vibration Anti Bark Collar Dogs Training Collar For all dogs The vibration mode only vibrates and does not generate electrical penalties. The operating principle of the electrical penalty mode The first bark will only trigger the vibration warning function. The second bark was accompanied by vibration and electrical punishment. At the same time, a vibration penalty is generated, lasting for 2 seconds. The first 1.5 seconds represent vibration and the last 0.5 seconds represent electrical penalty. The third, fourth, fifth and sixth barks will have the same function as the second one. The machine will enter a sleep state for one minute after being started continuously six times, and then restart after one minute.