The MSR-50R Series remote accessories are designed for use with ACI duct smoke detectors and other monitoring devices to provide the range of functionality required by your local commercial application. Remote accessories are usually required by the AHJ (Inspector) for installation. If a duct smoke detector is not wired to a _re system or a remote test station, when the unit goes into alarm, the end user would have to climb up to the duct to manually reset the unit. The MSR-50R Series comes in two models of the controller: the MSR-50RM which provides a hidden magnet test switch and a pushbutton reset; the MSR-50RK provides a key-operated detector test and reset function. Both versions of the MSR-50R accessory are available as either a single gang remote indicator/control, or with the addition of a single gang strobe only or enhanced sounder / LED strobe assembly. As controller only or with the added strobe only or sounder / strobe, all configurations are compatible with standard Decora style cover plates (choice of white, red or stainless steel).  The strobe assembly provides visual only indication; the sounder strobe assembly provides audible indication as well as visual indication of alarm conditions. Either option is connected to the indicator/control assembly via a provided polarized connector. For convenience, blue “SMOKE” and red “FIRE” strobe lens decals are included for both horizontal and vertical mounting. The strobe and audible buzzer features are not ADA compliant, and not intended for life safety notification or evacuation purposes (public mode). These functions are for duct smoke detector status indication only (private mode).