Lot of 2 System Sensor SPSCWL Fire Alarm Speaker Strobe Ceiling White. Used: An item that has been used previously. The item may show signs of cosmetic wear, including minor or deep scratches, scuffs, or other surface marks, but is fully operational and functions as intended. This item may be a floor model or a store return that has been used. See the seller’s listing for full details and a description of any imperfections.