Commercial Grade 3.5 HP Continuous Duty motor with heavy precision balanced flywheel and Full 20"X 55" multi-ply Running Belt. Patented Intelligent Weight Management software and wireless scale. Crowned rollers with sealed bearings provide superior belt tracking. Progressive Shock Absorption Deck rests on multi-durometer elastomer rings providing a soft landing surface in front with a firm surface to push off from in the rear; YowzaDeck125x100_091214.jpg. Fit Sound Bluetooth speakers .