Power supply to solenoid valves and other system components. U·power connects using CAN bus cable to a U·valve, U·valve+, U·meter, U·meter+, U·count or U·view whenever the power supplied by a U·dat keypad is not present. Model U·power with 75 w can be used to energize a maximum of 2 solenoid valves. · Remember, use Upower by NEXU to save time, fluids and money. VIDEO Youtube: https://youtu.be/14eMeluUqAE Instruction book: 838853.