Steelflex Mega Power Back Extension MBK1600Personal coach function Auto detecting (weight resistance) Auto counting Auto operation without setting Personal program provided Display: training time, calories, goal, accumulated data, counting down data 5 x 15 cm high tensile Strength oval steel Low gravity center for stability Substantial rear and side sub frames to eliminate lateral torsion and vibration Easy to use electronic coach Long bar to adjust the starting point of the cam (9 positions)