The user selects the hand cylinders, foot plates or stick on electrodes. The user goes to the main menu, selects a health condition they want to treat and then presses RUN. AliXXor does the rest, it changes frequencies as per the sequence and stops when the sequence is run. Flexibility The unit can utilize all frequencies up to 10,000 hertz so you have full flexibility to use any of these frequencies. You can make up your own sequences, vary the time that each frequency runs and pulse the frequencies. You can wobble across the frequency that is very each side of the main frequency and you can scan across a frequency range. The AliXXor is a very versatile unit.