1. treadmill 2. motorized treadmill 3. foldable treadmill there are four different modes-p0,p1,p2 and p3. ... are four different modes-p0,p1,p2 and p3.p0MODEL:HK-8100 unfolding size: 1100*520*1000mm power: 1.5hp voltage ... and p3.p0 is the manual mode and adjusting the treadmill speed is optional .p1,p2 and p3 are the automatic ...