Edwards Signaling 27193-21 Surface Mount Box, Red, 2-Gang 02/12 The GE Series appliances are

The GE Series appliances are ANSI/UL 464

Kidde R-Series Annunciators are high-performance remote annunciators that provide status indication and common controls for compatible fire alarm control panels

mid-size installations

and a local piezo sounder with a silence/acknowledge switch for audible indication of alarm and trouble conditions

The Edwards SIGA-TS4 is a 4″ box trim ring

Edwards Signaling 27193-21 Surface Mount Box, Red, 2-Gang 02/12 The GE Series appliances areEdwards 27193 Series Surface Mount Boxes are multi gang utility boxes designed for surface mounting where a heavy duty general purpose box is required. Devices can be mounted to pre drilled and tapped (#6 32) holes in standard one gang to five gang mounting configurations. They are constructed from heavy duty 16 gauge cold rolled steel (CRS) for maximum durability. The 27193 boxes are easily surface mounted with screws using the mounting holes