Variable frequency drive with display for command and control of pumps to be used in residential building service, commercial building service and in agriculture for pressurization, gardening and irrigation, lifting water from underground. The display makes it easier to check and enter the operating parameters also through a wizard during which the user is guided step by step in entering the operating parameters. The variable frequency drive saves energy and protects against water hammering. Inside the body there are a pressure sensor, a flow switch, a non-return valve, thermoamperometric protection, protection against abnormal voltages and protection against over temperature and frost. The DConnect service (with DConnect Box supplied separately) makes remote control possible.