The Ohaus VXMNDG Digital Mini Vortex Mixer allows input of the exact speed and time to achieve repeatable results every time. Offers effective speed control from low RPM start-up for gentle shaking to high-speed mixing for vigorous vortexing of samples. Touch mode operation activates mixing when depressing the cup head or continuous mode for use with accessory attachments. Sturdy, rugged design ensures the unit stays in place while in use.