C9097B Sounder Base is a four-wire sounder base. The Sounder Base can be used with detector mounted directly on the base,or with addressable fire alarm control panels or conventional fire alarm control panels.It is suitable for use in high-rise residential buildings, public places, such as hotels, amusement buildings, factories, shopping centers, hospitals, schools, office buildings and stock exchanges, and is especially suited for places with low visibility or where smoke may be generated.