Photo 1 of **MISSING MOUNTING PLATE**First Alert SM210, 10-Year Sealed Battery Smoke Alarm with Slim Profile Design, 1-Pack

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Photo 1 of **MISSING MOUNTING PLATE**First Alert SM210, 10-Year Sealed Battery Smoke Alarm with Slim Profile Design, 1-PackPhoto 2 of **MISSING MOUNTING PLATE**First Alert SM210, 10-Year Sealed Battery Smoke Alarm with Slim Profile Design, 1-Pack