The refurbished precor 556i total body delivers highly effective cross training and a total body workout key features of the precor experience 556i integrated footplant technology double step up flywheel for higher performance smart touch keypad technology 25 degree fixed cross ramp for lower body muscle emphasis 20 levels of resistance advanced eddy brake design to ensure your routines are as challenging as the first heart rate sensors built into the handles choose from the rx or exper