these Smoke alarms were returned from one of our sites, the code required Smoke / Carbon Monoxide Alarm that is why we had to remove these Smoke alarms and replace them with Smoke / Carbon Monoxide Alarm units. 

the items are used but in a new unit condition. they all come in Smoke / Carbon Monoxide boxes since we had to replace them and we lost the old boxes so we placed in the Smoke / Carbon Monoxide boxes, but all items here are the 9120B Smoke Alarms.