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. Sound insulated for quiet operation. Front mounted reset button for easy use. Safe for properly sized septic tanks. Fast and easy installation. 115 V, 60 Hz, 7 current-amps. 16-1/6 in H x 8-1/2 in D. Mounting hardware included. UL listed. LIFETIME IN-HOME WARRANTY. Lifetime corrosion warranty.