The Tonic Mass seat cover from Lanaform transforms any traditional seat or office chair into a real massage chair. Through its vibration massage, the Tonic Mass helps relax your muscles, reduce tension, encouraging relaxation and, hence, wellbeing. Specifications : Vibration-based massage 9 motors 8 preset modes 5 levels of massage intensity 4 massage areas (shoulders/upper back/lower back/thighs) Timer: 10, 20 or 30 mins. Cigarette lighter car adapter