This InSinkErator MS-8 control center will help you save water and energy. It is integrated with a single-direction magnetic starter that automatically shuts off the disposer in case of a power surge. This manual switch control center has a push button (on and off) switch for start and stop functions. This MS-8 control center is a NEMA-rated unit and is constructed of high-impact polycarbonate materials (outdoor/indoor use) to give necessary protection against particles and/or elements that can make other lower quality systems. It should be installed using a #8 screw. The quality and features of this control center make it ideal to use with the SS-100 to SS-200 Series of garbage disposers. Having complied with the ISO standards, this MS-8 control center is safe to use and is backed by InSinkErator's 1-year parts and labor (on-site) warranty.