Automatic Voltage Protector Socket AC 220V Adjustable 16A Power Surge Protector EU Plug Socket Voltage Safe Refrigerator Protect

We recommend it! It cuts off the current supply at 170 and 260, you can do it your own way, but this is supposedly the standard.

Great product! Just add an error margin of about +5 V (this relay shows 4-5 V lower than the actual voltage in the network). Take this into account when setting the operating ranges. The seller is excellent, the product arrived well-packaged, everything was neat and on time.

I already have 7 of these relays; they are simple, cheap, and protect the equipment.

It's working for now, we'll see what happens next.

Good socket, easy-to-follow instructions, I recommend it. It cuts off the power supply when the voltage drops significantly or increases; it arrived already configured.