The MAYTRONICS 99956083 Dolphin Dynamic IoT Power Supply is a replacement power supply unit designed specifically for Dolphin pool cleaners such as M400, M500, and M600 models. Made by the manufacturer Maytronics, this low-voltage power supply is compatible with various Dolphin models like M22, Nautilus CC Plus, M3, and Neptune. It is suitable for in-ground pools, providing a reliable power source for your pool cleaning needs.