M&S Systems Mounting Ring for Rectangular 5" Speakers (MC111M) - NMR5 - (10 pieces) The M&S Systems Mounting Ring for Rectangular 5" Speakers (MC111M) - NMR5 - (10 pieces) requires 10 batteries to replace it. The price above includes all 10 of them.The M&S Systems Mounting Ring for Rectangular 5" Speakers (MC111M) - NMR5 - (10 pieces) cross-references to the below. The NMR5 is the required mounting ring for the N65 Series of Room Intercom Stations. Install during Pre-Wire to insure proper placement and drywall cut-out. . . . The NMR5 is the required mounting ring for the N65 Series of Room Intercom Stations. Install during Pre-Wire to insure proper placement and drywall cut-out. 3 M&S Systems Yes http://site.apexbattery.com/logos/m&s systems.jpg New U