This 120W Replacement Power Supply, featuring Wi-Fi, is designed for compatibility with a wide range of Dolphin models including S300, S400, Active 30, Active 40, T45, T55i, Mercury, Triton PS Plus, Premium, Proteus DX5i, Prowler 930W, Explorer E50, Nautilus CC Pro, Explorer E30 wifi, Advantage Pro, and Premium 40. As a Maytronics Certified Genuine Part, it ensures your Dolphin pool cleaner operates at its best, maintaining peak condition and performance.