Based on an innovative design with a heavy-duty motor, adjustable speed controls and other advanced technical features, the Surge of Chi Exerciser gives exercise that is both stimulating and relaxing - in a way that can suit the needs of all ages, fitness levels and health conditions. Please Note: The Mark 2 version of the Surge of Chi Exerciser has been discontinued. It has been replaced by the FlexxiCore Passive Exerciser and the Surge of Chi Exerciser Mark 4 .