Since the ammeter is attached, you can adjust the opening degree of the shutter while watching the load of the motor. Although the scale of the ammeter is small, in use it is not very inconvenient to operate so as not to enter the red zone. However, it is a pity (-1 point) that the window of the ammeter is a bit small.
It has an analog type ammeter and it is useful because you can adjust the shutter opening while confirming the load of the motor. First, how about the scale of the ammeter is small? I also thought, but since it is only necessary to adjust so as not to enter the red zone when actually using it, the fine scale was unnecessary. There is no problem with the operation feeling of the switch, but it is regrettable that the display window of the ammeter is a little small.