Vortex-powered energy efficient high speed permanent magnet motor. Corrosion proof grinding chamber of glass filled nylon. Stainless steel swivel impellers reduce jamming. Removable splash guard is easy-to-clean and to replace. Front mounted reset button for easy use. Safe for properly sized septic tanks. Fast and easy installation. Designed to operate on 110 V to 120 V, 60 Hz. Mounting hardware included. UL listed. 2 years in-home warranty.