The Pro Form 425 ZLX recumbent exercise bike features a comfortable design & various functions to provide the most effective workout. It has a 7kg flywheel that ensures smooth motion & 18 levels of silent, frictionless magnetic resistance. The backlit LCD display provides you with all key feedback including speed, time, distance, calories & pulse & offers 18 pre-programmed workouts. The bike also has an i Fit SD card reader for goal specific interactive training. In addition, the dual EKG pulse grips allow for a quick & easy reading or for better accuracy a chest belt can be used (optional).