Product Name: Medifee 3D Air Mat Functions: Stretching, Twisting, Relaxation Mode Air Intensity: 2 levels Heater Intensity: 2 levels Timer: 15-minute auto timer I've decided to purchase a massage chair, so I'm putting up for sale this air stretch mat, which has been very helpful. The stretching and twisting functions are intense, and it also has a heater, so it was warm and useful even in winter.