Because it is used for weighing when we load dough, waterproofing and dustproofing is saved. Batteries run out and I replaced them myself, but I could not use it, so I bought a new one and read the instructions, it was written that please ask the dealer or service station you purchased to change the battery.
It is useful because it is used in places where many dust fly. In ordinary computers, there are often things that garbage enters from buttons and it gets hard to work, but this computer is none at all. It is safe to wash even if garbage enters. But it is expensive. And it is getting higher with a function that does not need tax calculation etc. But since it aims only for simple calculation, I also want a lineup of models with only a cheap and simple function.
About two and a half months have passed since I bought it, but the buttons collapsed from the user, which means that it is hard to use. I saw how to use (especially the strength of pushing the button), but there is no particular discomfort. It was disappointing because I chose a somewhat higher price because it was for a responsible person. In addition to being unable to return it, the user is accustomed to the arrangement of the buttons of this instrument and says that they want the same thing. However, we are worried about the same problem.