It is for body health Pls refer to the below detailly description * .With 4 speed: 30rpm, 40rpm, 50rpm, 60rpm can be adjustedfreely * Time: 5 different choice for time setting, 3min, 6min, 9min,12min, 15min * Rotate & Counter-Rotate: when rotate in a contrary way, it can be adjusted, in a mean while, it will pause 2 seconds and exist a process: speed down and speedup. * Display for accumulative ...