






🐾 Silence the chaos, amplify the calm.
The HeeNzz TZ-U36 Ultrasonic Dog Bark Deterrent is a compact, rechargeable device combining three training tools in one. With a 35-foot range and three customizable modes, it effectively reduces barking, digging, and chewing without stress or discomfort. Featuring USB-C fast charging and up to 60 days of battery life, it’s perfect for indoor and outdoor use, helping you maintain peace at home and in your neighborhood.







| Customer Reviews | 3.9 out of 5 stars 3,150 Reviews |
C**A
Not a Gimmick! Works on cats too.
I thought this was gimmick but it's been a game changer! Although it doesn't work on all of my dogs, like it says on the description, I can't believe I didn't get this sooner. It's the ripple effect that I like I have 5 dogs and cats. My oldest cat is antisocial, a drama queen. This actually works on cats if theh get into fights. They don't actually fight. They get into each other's faces. Two are senior dogs. My chiweenie no longer barks but she rarely barked to begin with since she's the perfect dog. My Chi-Pin senior still barks. It doesn't work on her, maybe it's the hearing? The device is more for the three young ones. The Pug My Pug has a thing of wanting to attack the Chi-Pin any time someone comes through the door. She's a great dog in other area except this. The device has stopped that! She even learning to sit pretty now. This device sold me on my problem child, the younger Chi-Pin. He has severe separation anxiety and will bark non-stop for anything. He marks all over house when he's anxious. He barks at people and dogs. Crate training was driving me nuts. He had been taken from his mama too early and he was regime to me for being too anxious. He has such a high energy! He is a nightmare to take out. The device stopped him from jumping up and down when people come in, jumping uncontrollably when he sees the leash, whining and biting the crate, barking when he sees sirens, at a delivery person, having barking matches with the neighbors' dogs. I took the device with me during a walk and he stopped lunging and barking at people and riders on bikes and scooters, parents taking their kids on strollers. He's not aggressive, he's just loud! He's actually able to enjoy his walks now. He still is reactive to other dogs when they bark but the walks are far better now. Before while still getting trained to walk better on the leash he was still so anxious when walking. He's now waking better. The crate training has finally been done right. This device didn't increase his anxiety. It calmed his anxiety! It only took one time to drastically reduce his barking and anxiety. He figured it out right away. The device doesn't work on my sibling's reactive GSD. When the GSD would visit it was a complete chaos. Now it's a ripple effect. Having mine now calmer the GSD is calmer. People couldn't even come down the stairs or flush a toilet (flush ffs!) without them wanting to fight each other and barking like lunatics. Now they stay quiet and calm when someone comes down the stairs. Overall, it hit my target audience and threw me a curball working in cats. It has good battery life. Very easy to use and small enough to take with you. I'm buying another one for sure.
D**T
Best purchase ever I could actually plant and do things in my front yard like I want to
OK, best thing we ever bought. We have been living in our house for 10 years our neighbor or next-door which we love but do not want to have a conflict with has two German shepherds that constantly bark at us every time we are out in our front yard.. first of all I am a total dog lover. We have five dogs, but I do get after my dogs for barking these dogs do not get corrected. This thing works like a charm . I can walk around with it leave it in my pocket and when they start barking at me, I can't actually use it within my pocket without her knowing about it if she's in the backyard and they do stop parking at me, which is awesome because it's kind of annoying.
T**E
Bark deter
It’s a great tool. Works well
A**R
Useful tool
This device works well on my dog. It stops him in his tracks almost instantly. He finally got so used to the way we walked that it became his routine. After a while, it became unnecessary and he followed my lead. It fits right in your pocket.
A**Y
This works great to deter my younger dog from barking
This works great for my younger dog. I don’t even have to press anything anymore. I just show it to her and she stops barking.
S**.
Not for our barker
***Updated to add a star. THe sellers reached out and really wanted to apologize for the product not working for our dog and wanted to make it right. I feel they went above and beyond in the customer service department. They even sent me other options that might work on my dog. I havent purchased or tried them yet but likely will. Unfortunately this product did not work for our barking dog. Our dog is probably between 50 and 65 lbs, mixed breed. I could tell that he could hear the noise however it did not deter him. He's a very active Barker and shock collars have not been helpful in deterring the random barking. So this was our last ditch effort. And unfortunately it was not helpful. I've heard other people who have had great response with this particular product. Maybe the size of the dog is a factor... Shipping was great and fast. Product was delivered as expected and I great shape.
M**N
Bark deterrent
Works well. Very durable.
G**N
Neighbors will be thankful
We have 2 large dogs that bark every time they go outside. This thing works great and I’m sure our neighbors are very happy we purchased it!
H**M
Useless
It didn’t work for the reason I bought it for.
M**O
Tal como la imagen
Tal como la imagen
K**F
لايوجد تأثير على الكلاب
الجهاز لايقوم بطرد الكلاب لايوجد تأثير
J**N
Very Handy Tool
I like that it’s rechargeable and portable. It doesn’t work on every single bark, but it helps interrupt the behavior so I can redirect my dog. Good value.
R**H
Brak efektów z działania urządzenia
To urządzenie kompletnie nie działa. Po przyłożeniu blisko do ucha słychać ze emituje jakieś dźwięki. Testowałem przez dwa tygodnie na różnych psach - małych, dużych z podniesionymi uszami, oklapłymi uszami. Psy były mocniej lub mniej szczekające. Testowałem z bliskiej odległości przy różnych możliwych konfiguracjach częstotliwości. Kompletnie zero reakcji na działanie tego urządzenia przez którykolwiek z psów. Przed zakupem przeczytałem wiele opinii - większość pozytywnych aczkolwiek ze wskazaniem że to nie jest zawsze 100% efekt. Ale w moim to jest kompletne "zero". Może jest jakieś wybrakowane. Ale z drugiej strony niby działa ale nie działa.
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