so I took the bait.
I always move away from the bait ... I will advice you to do the same from now and on.
Spoken like a wise man.
Vichy isn't trustworthy.
I can not tell about the trustworthy part.
But today it is so easy to build an almost accurate unit on the DC range, Ohms it is easy too.
This DMM was build with CAT I in mind, and so other than old technology ( slow in operations) they follow an ancient CAT rating too.
I would not be afraid to use this in Mains , speaking about in door home use, so to verify 220V on the Mains plug.
But the major problem with those, are that if they hit the floor for some reason, you can not tell if they do operate correctly after that.
Dave offers one major contribution in the world by performing live the "1 meter drop test ".
But he should test the operation at 220V AC after the drop.
The most risky part is to measure mains, the DMM to not show anything because it has some sort of damage,
but the Mains socket to be live ( active) with 220V on it !!
The golden rule is to double check every mains source with a volt-stick too.
The UNI-T 15C it is the safest made volt-stick up to date, in the most friendly price.
And if I could offer one suggestion to every one who gets an low priced DMM,
it would be to get and the UNI-T 15C volt-stick so to have them as pair.
The volt-stick it will lead the attack at the mains plug, and the cheap DMM will follow, as soon there is no danger around.