Check the listing for details. DB-11 SIEMENS. Condition: New. Listed at 8.87 USD. ITEM FOR SALE: (NEW) SIEMENS DB-11 FIRE ALAR SURFACE MOUNT DETECTOR BASE FOR THE SERIES 11 The Siemens DB-11 detector base is compatible with Model ‘H’ series,‘11’ series, and ‘121’ series of conventional detectors. Also compatible with addressable Siemens Model ‘H’ series detectors, as well as Models OH921, OP921, OOH941, OOHC941 and HI921 intelligent detectors. Mounts on a 4-inch octagon, square or single-gang electrical box. DISCLAIMER: ORIGINAL PRODUCTS 30 DAY RETURNS FOR INTERNATIONAL SHIPPING, CONTACT US MORE ITEMS AT OUR eBay STORE: CLICK HERE 12 MONTH WARRANTY WARRANTY TERMS* FireSafety2014 will provide a 1-year warranty beginning from the shipment date of products ordered. Our warranty will cover full replacement of all units and cover return shipping charges of all products purchases from FireSaftey2014© The procedures are as follows: Once we receive the package we will confirm the serial number of the product. If this product matches the items ordered we will send replacement product the following day via ups ground. Thank you for shopping at FireSafety2014©