Before revision: The voltage range of the successor Pump Express Plus 2.0 is between 5 volts and 20 volts, with half a volt between each step (5.0 V, 5.5 V, 6.0 V, … , 19.5 V, 20.0 V).
After revision: The voltage range of the successor Pump Express Plus 2.0 is between 5 volts and 20 volts, with half a volt between each step (5.0 V, 5.5 V, 6.0 V, ... , 19.5 V, 20.0 V).