Waste of money. Stay away from this product. Cheap construction. After 2 years it stopped working and kept cutting the power to the fridge, until it wouldn't even start again. Basically dead. Better go for Kebo. Best value for money.

It's good. You put it on and forget about it. I'm buying it for the second time for sensitive devices. The first time I bought it years ago and it hasn't broken

Within 1.5 years it stopped working!!! It is of low quality. You don't need a phase monitor but a Vmark or kebo stabilizer for fridge, dishwasher, TV... I have them for years now and nothing has happened all these years... A voltage stabilizer (voltage stabilizer or voltage regulator) is an electronic device that:
• Maintains stable voltage at the output
• Protects against overvoltages, undervoltages, and spikes
• Ensures proper operation of sensitive devices (e.g. computers, TVs, fridges, sound systems)
Types of stabilizers
• Electronic (servo) – more accurate, suitable for large devices
• Relay-based – more economical, suitable for home use
• UPS with AVR – offer both stabilization and battery

From what I understand, it works just fine, but I have constant fluctuations in voltage and it cuts off. I have put a UPS on it and it shuts down the UPS as well - so then it shuts down my computer too. I don't know if the product is to blame.

After a few months, the product stopped working. This happened now during the summer, resulting in the refrigerator being without power and our return from vacation being accompanied by "pleasant" smells of spoiled food. We won't even discuss what we encountered when we opened the refrigerator and freezer. After testing, it was found that it had completely stopped functioning. It is not worth purchasing; look for something else, with an emphasis on the power supply reliably (!) returning after the interruption delay.

After just one year, it simply stopped working. I only had a television plugged into it. If I have to buy a voltage stabilizer every year, it's better for the television to burn out and buy a new one.

Continuously cuts off the power, you turn it off and on, wake up the next day and the power is cut off again. I have to say that I have never burned a device, I just used it for protection, but if I continue to use it, I will probably burn a device. Money wasted.

Just bought it.. Haven't tried it yet.. Just uploading a photo for anyone wondering about the connectivity. It can be hung with a hook or simply placed on a shelf.

It was tested on 2 outlets and responded correctly. Also, the indication of the Volts on the screen is useful.

It constantly cut off the power supply to the refrigerator, so fearing that I might burn the refrigerator, I rendered it useless and wasted my money.

With bad weather, the TV suddenly turned off..
While the house had power..
The machine showed high voltage above 267 volts..
I measure the socket with a voltmeter to see if what it says is true..
All the other devices were on, only this one cut off the power supply to the TV for protection.
After a few minutes, the power was cut off in the area.
The only thing that was protected was this one.
I have installed others from different companies and they did not cut off the supply with a voltage of 267 volts.
I will throw away the rest and put the same one in the refrigerator and washing machine.
I also installed it in a freezer refrigerator washing machine pellet stove together with upc..
It really works under voltage.
update
We really have the most tragic network..
The power cuts off and comes back in a second, with all that it means for the devices..
Where I haven't installed the machine yet, I already have a burnt device.

Yes, it is a bit bulky. What needs a little attention is the On/Off switch, which can be accidentally turned off (during cleaning, with your feet if it is near a desk) as it protrudes. Other than that, everything is good and unnecessary to be...

I bought it for installation in a 20-year-old telephone center.
It operates silently and without any issues so far.

It seems to do the job and read the volts correctly, as I confirmed with a multimeter. Due to its simplistic design and the label "Hellas," I assumed it was Greek-made. Unfortunately, it is made in China, like everything else nowadays, hence the 4 stars.

UPDATE 1 YEAR LATER: It almost burned my refrigerator. While the socket had 227 volts, it read overvoltage, cut off the power supply, and after a delay of 5 minutes as designed, it restored power BUT only to cut it off again within seconds. I don't know how many times it went through this cycle before I realized it! It would open and cut off the power to the refrigerator until I noticed it!!!
The ridiculous thing is that if you used the button to read the voltage, it showed the same value as the multimeter, 227.

In short, we went for hair and came back with a haircut. Instead of something good, we would have ended up burning the device.

It was purchased a few days ago (5 pieces for various sockets in 3 houses). It's not cheap, but if it does its job, it will be super.
The first impression when opening the courier package is about its size. The definition of "bulky". It's really big for a single socket. If you don't have enough space where you want to connect it, it's better to look for another one. Fortunately, in the 4 that I have installed so far, the space was just enough.
In terms of quality, I was impressed that the casing is metallic (I don't know why).
As for effectiveness, I don't know yet. I hope that when it needs to protect the devices, it will do it properly.
The 1 star that I deducted is solely due to the size of the device.
Note: For a bedroom, the light of the indicator screen can be annoying if it falls on the eyes... of the peacefully sleeping person...