Pet Dog Ultrasound Repeller - Safe Training Equipment Color:PU30 Black readjust how tight you want

readjust how tight you want it without taking off the band

you can don't buy it

5mm stereo headphone jack

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Pet Dog Ultrasound Repeller - Safe Training Equipment Color:PU30 Black readjust how tight you want100% Safety This dog bark stopper does not use any liquid propellant or harmful sprays or chemical, which is one hundred percent harmless to your dogs or other pets or plants, and of course safe for yourself and your families, friends, etc. Effective Range Equipped with upgrade 3 channel high pitched ultrasonic sensors that have 20~25KHZ power frequency, this ultrasonic dog bark deterrent can effectively expel dogs within 5M. Multi function This