I use it as a hobby, but I put this product in the area where water penetrates if it penetrates. It got cheaper than the selling out of the meter unit of the vinyl sheet at home center etc. However, the difficulty is that the right angle of the four corners of the case is extremely sharp and it hurts. I thought that it is the best product if R2mm is attached to the processing of four corners. However, since it is not selling soft case A3 size at 100 yen shop, it was very helpful.