To meet local code and application requirements, Mircom offers standard 4” and 6” bases, as well as, specialty base designs including relay, isolator, sounder and low frequency sounder options for Select Series detectors. The standard 4” and 6” bases offer a plug-in detector base intended for use in intelligent systems. The 4” base offers a compact design while the 6” base provides compatibility with a wider range of junction boxes. See the Select Series Junction Box Selection Guide on the next page for junction box options. The Select Series specialty bases support application driven requirements.