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, 4.5 current-amps. 13-7/16 in H x 7-5/8 in D. Mounting hardware included. UL listed. 5 years in-home warranty. Lifetime corrosion warranty.