Brown plastic HB-701 massage gun with adjustment dial. - Model: HB-701 - Patent Number: PAT. 373142 - Adjustment Dial: Included - Color: Brown I bought this about 10 years ago for around 80,000 yen because I liked the one used in treatments when I was going to a chiropractor. It can switch between strong and weak settings and can massage acupressure points and muscles, but I couldn't use it on my back by myself, so I only used it a couple of times and stopped. It has been stored at home for a long time, so the instruction manual is quite dirty (images 10 and 11). Please purchase only if you understand this.