It is a centralized switch and the 1.5 m code is the deciding factor. Depending on the use of the switch, 1.5 m of code is just right. If it is 1 m, it will be as short as 2 m. Maker, why do not you take the perimeter statistics? Perhaps there is a wasteful line-up of 1/3/5 m which is common now. I think that the construction and angle of the part to be plugged into the wall power supply are made funny. The concentration switch has poor feeling of ON / OFF, and it becomes a little uneasy whether I do not know actual durability. I was glad that the direction of the switch was reversed, but is this because it depends on where you use it, can not it be helped?