Relaxation mat using natural mineral stones that comfortably warms up to a maximum of 80°C. Color: Brown Thank you for viewing. I purchased this half a year ago, but I've only used it twice due to lack of time. There is no instruction manual. You only need to turn on the switch and set the temperature and time (in minutes). I purchased it for 59,000 yen. The condition is good, and the operation has been confirmed. Price negotiations are welcome.