Shiatsu foot massager (vibration - heating - compression) The massager will automatically turn off after a 15-minute massage session to avoid overheating. The heating function of the massager is mainly to relieve heat, and slow warming is safer to take care of your feet. 3 M1 massage modes (massage with rollers, airmassing and pressure) M2 (massage with rollers and massing) M3 (Massage with air pressure)