Review on 🔌 SE 15 Amp Electronic Variable Speed Controller by Kevin Graham

4). common arc) and red (high) section (about 1/4 of the common arc). My Hitachi Wand on high vibration mode only changed the vibration levels in the red (high) and green (mid) arcs, and on the low vibration setting only the vibration level changed throughout the red (high) arc. So on my wand, this "Hitachi Wand Massager Speed Controller" is only useful at 1/2 or 1/4 of its available range. To me this means that the description of the item is technically correct but misleading. I wouldn't buy it if I knew it wasn't fully useful.