1. Auto intellectual massage model for full body kneading ,tapping ,rolling 
       and dual function (kneading & tapping ) on backrest.
   2. 3 levels of vibration intensity ( weak , medium , strong ).
   3. 3 levels of massage intensity ( weak , medium , strong ).
   4. Manually controlled angle of backrest and footrest .
   5. Equipped a set of intelligentized four-wheel driven 3D massage 
       mechanism.
   6. Detachable arm.
   7. Zero gravity .
   8. Footrest with extending function up to 10CM,contracting function.
   9. Two actuator