This seat cushion has 10 strategically placed super Bio-Magnets. Soothing heat relaxes tense muscles, increases blood circulation, and allows the massage to penetrate deeper into muscle tissues in addition to lumbar support which protects lower spinal discs and promotes proper spin alignment. Massagers in the upper back, lower lumbar muscles, and legs can range in up to 20 different massage combinations. Comes with a controller with multiple settings and AC & DC adapters.