ADDENDUM: It is now gone four months since the purchase. The balance was not very often. Unfortunately, now is the ON / OFF / TARE key has no function. Too Bad. Waaage went back without problems to Amazon. Basically, I was quite happy with it at this time. But since it is apparently already happened on several occasions, (see 1 star review) that the button does not work, there is a devaluation of 5 to 3 stars.
