Desk and home massager.. Works on levels, directions, and areas as controlled. Inside it, wheels work circularly. Starts from the back of the head, neck, and shoulders, Going down to the spine from the shoulder to the lower back. Ends with a piece at the bottom of the seat that works in several modes: Rotation and vibration. It has a back strap for fixing to the chair. It was purchased from the parent company (Body Care). The device works well and has no malfunctions.