The FLEX device records both peak velocity and peak power.
To access alternative metrics, including peak alternatives, simply press on the METRIC displayed in the training dial on the active training screen. For example, pressing the word 'Mean Velocity' will switch the metric to Peak Velocity.
You will see Mean Velocity change to Peak Velocity and that is now the value to be displayed on the main dial.
To switch back simply tap the Peak Velocity button. Follow the same process to switch between peak and mean power, or between height and distance.
To access alternative metrics in the Review and History screens, simply press on the METRIC name (for example 'Velocity' in the image below). Or, if viewing the all exercise summary table, press anywhere on the table to switch the metrics displayed.