Operation of the CZ-388 massage chair is controlled by a microcomputer, enabling various intelligent massage functions, such as kneading, Swedish, tapping, shiatsu, clapping, rolling, Scrapping, vibration and air pressure twisting modes. The CZ-388 utilizes 8 sets of Auto massage programs, Twin Rollers to mimic the feel of the human thumb, and Auto scanning to customize the height and feel. The S-track backrest aligns with the curve of human spine and additional features include heating therapy for the lumbar region, seat vibration, full body air squeezing massage located in back, seat, arm and legs, and a power surge protector and auto shutdown for safety. Warranty: 1 year in-home service & 2 years part. Add an additional warranty with Extented Manufacturing Warranty sold seperately.