The Advanced Vortex Mixer features touchpad controls and LED displays for accurate speed (rpm) and time (minutes/seconds) results. The micro-processor feedback control maintains set speed for strong, consistent mixing action. Timer will display elapsed time or when programmed to user defined time limit, the unit will shut off when time reaches zero. Choose from two modes of operation; continuous mode when using accessory attachments or touch mode which activates mixing when depressing the cup head.