The Maytronics 99953035-EX is a 3 Hour Deluxe drive motor (115V DC) used inside select Dolphin robotic pool cleaner assemblies. It’s the sealed motor unit that powers the cleaner’s drive system so the robot can move and scrub during its programmed cycle. This replacement motor is intended for Dolphin models that use the 3-hour, 115V DC “Deluxe” motor configuration. Confirm compatibility by matching the part number 99953035-EX to your cleaner’s parts diagram or existing motor label before ordering.