The star trac e series etrx is the treadmill that you can modify with user focused breakthroughs like the soft trac impact absorption system and the aero bar comfort grip system star trac continues to put their treadmills a step ahead of any other brand the key features of the star trac e series etrx etrx treadmill with led screen easily accessible hot bar is located closer to the user with one finger speed and elevation controls integrated stop button and contact heart rate grips 12 work