UPDATE after 2 years of use
The reliability of this scale is debatable. The same object weighed twice longer gives the same extent. Sometimes up to 50 grams of difference
Setting to zero is now very difficult. When empty, the balance may indicate + 20g, sometimes -30g.
Obviously, this balance is no longer as reliable as when I received (the batteries are fresh and the balance is outside in perfect condition).
If this is a remake, I'd take another scale.