

🐾 Silence the chaos, amplify the calm — train smarter, live quieter!
The HeeNzz TZ-U36 Ultrasonic Dog Bark Deterrent is a compact, rechargeable device offering three training modes—ultrasonic, sound, and flashlight—to effectively reduce unwanted dog behaviors like barking, chewing, and digging. With a 35-foot range and up to 60 days of battery life on a single USB-C charge, it provides a humane, stress-free solution for indoor and outdoor use, suitable for most dog breeds and even effective on some cats.







| ASIN | B0DX1R37GZ |
| ASIN | B0DX1R37GZ |
| Age Range Description | most of dogs |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Best Sellers Rank | #10,939 in Pet Supplies ( See Top 100 in Pet Supplies ) #27 in Sonic Bark Deterrents |
| Brand Name | HeeNzz |
| Breed Recommendation | most of dogs |
| Care Instructions | KU-568 |
| Color | Orange |
| Customer Reviews | 4.1 4.1 out of 5 stars (3,783) |
| Date First Available | March 4, 2025 |
| Date First Available | March 4, 2025 |
| Department | T9Zo |
| Department | T9Zo |
| Directions | for most of dogs |
| Included Components | dog bark deterrent devices |
| Item Package Dimensions L x W x H | 5.12 x 2.95 x 1.97 inches |
| Item Weight | 4.9 ounces |
| Item model number | TZ-U36 |
| Item model number | TZ-U36 |
| Manufacturer | ShenZhen TIZE Technology Co.,Ltd. |
| Manufacturer | ShenZhen TIZE Technology Co.,Ltd. |
| Material | Plastic |
| Model Name | TZ-U36 |
| Number of Items | 1 |
| Package Dimensions | 5.12 x 2.95 x 1.97 inches; 4.94 ounces |
| Size | Portable |
| Specific Uses for Product | dog |
| Style | Compact |
| Target Audience Keyword | Dogs, dogs |
| Warranty Description | 2 Year Manufacturer |
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.
K**E
Works so far!
This seems to be more effective than the previous item I tried to use to quiet the annoying barking dogs. I had a different product that used 9V batteries and was supposed to automatically sense barking, but it used the batteries up so quickly that it barely ever worked. So far, I have used this on my neighbor's annoying dog, which is a constant barker. It seems to work well; the dog will stop barking after I press the sound button 2 or 3 times. This is rechargeable, so you don't have to worry about the battery draining constantly. I hope this product continues to work as intended. There are a lot of products similar to this one on Amazon that do not seem to be effective. The only con is that it is effective up to 35 feet. I wish it had a longer distance so it could work on the other dogs across the street who are unfortunately beyond this range.
C**T
Pomeranian Yappity Yap
I have another handheld device and I wanted to order another one but it's out of stock. This one had the most positive reviews and the price was the same. I was worried this one wouldn't work on my boy but I'm thrilled to report that it does. The best part is that he will be outside barking at the wind and I will be inside in my living room and it works thru walls! That is very impressive and worth the money. I plugged it in last night so it would be fully charged. Everything is perfect. Another bonus with this one is that it's small enough to put in your pocket and it has a wristlet strap. Tucker, my pomeranian is a handful. Poms are known as barkers but his is overly excessive and I can't handle it. I've had 3 other Pomeranians and I tried everything on the market and none of them worked for them. I read an article somewhere that dogs don't all hear the same frequencies. So if this one doesn't work for you (sorry about the sellers) try a different device. Overall I am very happy with this device and I recommend it to anyone that can't handle excessive barking.
K**R
Works well—- worth it for the price!
I’ve been using this ultrasonic training device for a few weeks now, and overall, I’m really pleased with the results. One of my dogs responds immediately to the sound—he stops barking and pays attention right away. It’s been super helpful in curbing some of his more stubborn behaviors without having to raise my voice or use harsher methods. However, my other dog doesn’t seem to react much to it. I’m guessing it just depends on the dog’s sensitivity to the frequency or maybe their level of distraction. That said, even getting a 50% success rate at this price is absolutely worth it to me. The device is easy to use, lightweight, and feels well-made for the cost. If you’re dealing with minor behavior issues and want a humane option, I’d definitely recommend giving this a try!
G**S
Works well with consistency and patience
I’ve been using this dog bark deterrent device for a few days now, and I’m pretty impressed with the results so far. My dog’s are generally well-behaved, but they tend to get overly excited and bark at every little sound outside. This device has definitely helped reduce the unnecessary barking. It’s super easy to use—just point and press, and it emits a high pitch tone. My dog’s were startled by it the first couple of times, but they quickly started associating the sound with barking and calmed down faster than usual. It doesn’t hurt they or seem to stress them out, which was important to me. The battery life has been great, and it’s lightweight enough to carry on walks or keep nearby at home. The range is decent, too—works best within 30-35 feet free of obstacles. Just a heads up: it’s not a magical fix overnight. Like any training tool, consistency is key. You’ll still need to reinforce good behavior and be patient, but it’s a great support tool if you’re dealing with excessive barking. Overall, I’d recommend it for dog owners looking for a gentle and effective way to manage barking, especially in combination with positive reinforcement training.
M**O
Tal como la imagen
S**A
This ultrasonic bark deterrent works well for reducing excessive barking indoors and outdoors. Lightweight, rechargeable, and feels safe and humane for dogs. Effectiveness can vary by dog, but overall it does the job and is good value for money.
M**I
“I bought this item and then traveled to my home country. It worked once and then completely stopped working. Unfortunately, I couldn’t return it because I am outside the UAE. It’s really disappointing to spend 80 AED on this item, especially when it only worked once and costs just $5 in China.”
R**H
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.
H**M
It didn’t work for the reason I bought it for.
Trustpilot
2 weeks ago
3 weeks ago