I wish I had never bought this chair! It's vibration function is so light you can't feel it!  It's Right arm doesn't stay screwed in no matter how many times I redo it!! It is far to low to the floor to get in and out of comfortably!!  
I feel totally stuck with the chair as I would never be able to put it back in the box it arrived in, the box was so beat up, to return and it is already put together.  It took me several hours to put together by myself, and the directions were such fine tiny print and difficult to figure out!!!  NOT HAPPY RIGHT NOW WITH WAYFAIR  and plan to not buy from them again!!