Counter-balanced lift mechanism with ASTM standard actuator pushes the entire chair up to assist the user stand up easily without adding stress to back or knees, smoothly adjust to lift or reclining position you prefer by pressing two buttons on outside of right armrest when sit in the chair. It comes with 8 vibrating nodes (back, lumbar, thighs, legs) and 3 massage modes for selection, each massage point can be operated individually. You can choose to massage a specific part separately. There is timer function in 15/30/60 minutes which is convenient for you to set massaging time. Add a lumbar heat point to promote blood circulation throughout your body, providing a full body relaxation!