... speed: 30rpm, 40rpm, 50rpm, 60rpm can be adjustedfreely * Time: 5 different choice for time setting, 3min, 6min, 9min,12min, 15min * Rotate ... speedup. * Display for accumulative rotate time: it can display the number for rotate time. * Display for counter down: display the number for fixed time.* Auto- ... 6 seconds, t he buzzer begin to give an alarm and bibi sound, press ON/OFF button for restarting ...