Simple design black door stopper, provides stable fixing power. - Brand: marna - Color: Black - Type: Door Stopper Retail Price: ¥5,500 ◎ Condition New, unused. I purchased it from the official website for home use, but it didn't work well with my door, so I'm selling it. I only tried attaching the magnet, so it's in a clean condition. The box and instruction manual were discarded because I planned to use them. Only the main unit is included. You can probably find instructions on how to use it by searching online.