medical breakthrough 4 v2 recliner massage chair | full body shiatsu heated massage chair | zero gravity electric recliner | foot rollers, calf, arms, shoulder, neck & back massager - (black) medical breakthrough superior l-track design: the medical breakthrough 4 is an l-track full body massage chair designed with a set of vertically movable, four wheel driven, muted intelligent massage hands. the l shaped back track fits the curves of your body, and when reclined can put the user in a zero gravity position, allowing for a more relieving massage. unbeatable massage techniques: the breakthrough 4 has a smart body scan system that automatically detects the position of a user's body and adjusts the chair to deliver targeted therapeutic massages. the massage chair comes programmed with massage techniques such as shiatsu, kneading, flapping, knocking, and simultaneous kneading and flapping, and comes with 6 automatic massage programs. the breakthrough 4 comes with two memory functions so you can store your favorite chair positions and massage settings between sessions or different users. manual massage modes for the upper body have three options, fixed, partial and overall massage, with five levels of speed. in flapping and shiatsu modes and knocking, the width between the two kneading balls is adjustable with three levels: wide, medium and narrow. on partial and fixed point, the massage hands can move up and down to more accurately adjust the massage point. the air pressure massage function has three modes: full body, arms, and legs. each one has three adjustable intensity levels. the attached foot and calf massager is designed with a roller massage function that covers the bottom of foot, and includes two pairs of papillae for toe root rotating massages, as well as a mastoid skin scraping massage for the heels and arches of your feet. soothing infrared heat: the heating function uses a carbon fiber far infrared heat source to produce radiant heat that warms your body from the inside out. space saving design: the backrest frame slides down to keep a minimum distance from the wall to preserve floor space in your house.