The Evolution Septic Assist garbage disposal is specifically designed for homes with septic systems. The Bio-Charge injection technology automatically injects more than 300 million enzyme-producing micro-organisms into the InSinkErator Septic Assist each time it's operated. Features: SoundSeal Technology delivers Quieter performance allowing you to hold a conversation with elevated voices in the same room MultiGrind Technology delivers two stages of grind and allows you to more efficiently grind difficult food items like bones 3/4 Horsepower Dura-Drive Induction Motor is engineered to specifications used for appliance motors, provides quiet operation and long life Features Bio-Charge Injection Technology that utilizes a natural microorganism to help break down food waste Helps break down food waste (fats, grease, proteins and starches) Deodorizes to help control sink and drain odors Safe for drain fields, pipes and the environment 40 oz. Stainless Steel Grind Chamber and Components for durability Quick Lock Sink Mount allows for easy installation and disposer replacement Product ID 94304589