The stabilizer is 2000VA with a power factor of 0.8, which corresponds to 1600Watt (Manufacturer values).
Also, the maximum current that can pass through the device is 8.7A (See device label derived from (2000VA / 230V).
This power is naturally given at 230V.
Noise < 40dB manufacturer (applies).

The term "voltage stabilizer" for these devices is on the verge of misinformation.
The correct term is automatic voltage regulator.
The deviation ± 10% from the reference value of 230V is extreme to be characterized as stabilization.

So when the input voltage ranges from 207V - 252V, the regulator treats it as normal and does not intervene.
These devices are actually multiple transformers in one. Depending on the input voltage, a microcontroller intervenes and sets the input to the transformer.
The windings of the transformer are 4 and correspond to the ratios 100/90 100/100 100/120 100/140.
If we select the button 110/280, the regulator does not cut within the predetermined limits and thus the output voltage goes outside the range of 207V - 252V.

- Important
When the voltage drops, the power decreases accordingly, as the current of 8.7A cannot change.
If the voltage reaches the lower limit, i.e. 150V, the power is reduced to 1044 Watt (150V x 8.7A x 0.8).

If we are in areas with intense fluctuations in the network voltage, we should calculate the loads we will connect based on the lowest possible power. It also requires a 16A circuit breaker of at least C curve. Otherwise, it will trip the circuit breaker as it will require an instant current much higher.
- It is good for the loads we connect not to exceed 60% of the nominal.

Positives
- Silent with values that agree with those of the manufacturer (< 40 dB).
- Digital input and output instruments that agree with the actual values (multimeter).
- The input and output indications perfectly agree based on the calculations on paper.
- Two output sockets.

Negatives
- Temperature (At an ambient temperature of 25°C, even without load, it reached 51°C).
- It has an approximate power consumption of 22 Watt.
- It has a significant inrush current during startup and requires a 16A circuit breaker to work smoothly.
- The normal output deviation is ± 10% (± 23V).

Good value for money. If you are looking for a stabilizer with a deviation of ± 5%, the lowest prices in € are five times higher.

In the photos:
1. Operation in overvoltage.
2. Normal.
3. Normal.
4. Undervoltage.
5. Device label

Very good product and very good build quality. It comfortably handles a powerful computer and a monitor together at the 1600 watts it outputs. Sometimes it makes a little noise but nothing significant.
Edit 23/1/22 Changed to 4 stars due to the noise.
It has the classic hum of a voltage stabilizer that can be bothersome at night. Otherwise, it is quite good.