For some reason, while testing with the TV remote (you point the old remote at the mask and press a button) it darkens immediately, but when I was welding at first, when the welding "sparked," it didn't darken. Maybe because I had it at lower amps and it barely touched, so it didn't emit enough radiation? I don't know.

During welding, it was ok.

It darkens quickly and returns the same. For amateur use it is perfect, for professional use I do not know the type.

It quickly reduces the brightness to protect the eyes. It worked well for me. It was a bit challenging during assembly, but it didn't bother me too much.

Fair mask for the purchase price (22€). I have seen it in stores for 44€. Its plastic is quite thin and if something heavy falls on it, it will definitely break, but for amateur use like mine it's ok. It has many adjustments to find the ideal position and is very comfortable and lightweight. In terms of shading, it operates automatically and immediately, I did not encounter any problems.

Fast response to spark on the glass. These masks solve your hands in sticking as you see exactly where you stick and you have both hands free. The casing is plastic, while for its money it has a very good grip on the head.