Standard BL Recessed Edgelit Aluminum Exit Sign Single Face Green Letters Clear Panel Black Trim Plate AC Only (RELZXTE1GCB2C 120V WM USA) backorder1428 The internal electro chemical sensor communicates B150E75NS The internal electro chemical sensor communicates with a sophisticated on board microprocessor that accurately tracks CO levels over time rated up to 60W maximum lamp wattage Dual Circuit Operation With 120V Input No Self Diagnostics Wall Mount Assembled In USA No Custom Wording Standard BL Recessed Edgelit Aluminum Exit Sign Single Face Green Letters Clear Panel Black Trim Plate AC Only (RELZXTE1GCB2C 120V WM USA)