Check the listing for details. NuTone® DR1BA Electric Door Release for NuTone® Intercom Systems & other brands. Condition: New. Listed at 129.95 USD. This NuTone® DR-1-BA Electric Door Release (Also known as an Electric Door Opener or Electric Door Strike) is designed for use with NuTone® Intercom Systems and comes with a 1-year manufacturer warranty. The release is suitable for use with 16 to 24 volts A.C. and is a great addition to any home security system. This product is perfect for those looking to upgrade their home intercom system and add an extra layer of convenience and security. The DR-1-BA Electric Door Release is primarily designed to fit in a standard wood door frame, but can also be mounted in a commercial aluminum door frame, too. The small package with the yellow Instruction Sheet is a NuTone exclusive, Coil Caps. They enhance the electro-magnetic pull of the unlatching mechanism, especially on long wiring runs on 16-Volt systems. 1-Year Warranty30-Day Returns FREE SHIPPING (In the "Land of the Free") Don't like my price?—Make me an offer!