It does what it promises, of course, an electrician wants it. Important! It concerns single-phase power supply, so:
- If you have a three-phase power supply, you can only use it for one device, for example, protecting the kitchen or water heater or air conditioner for undervoltage, overvoltage, etc., and you need safety sockets for the other devices, such as televisions.
- If you have a single-phase power supply, you put it in the phase to protect the ENTIRE house and you don't need safety sockets.
- It has a 2-year warranty