First Alert® smoke alarm owner's manuals are available online for download at no cost. We will, for a small shipping fee, also gladly send you a replacement owner's manual or equivalent instructions. Please have your smoke detector model number handy when requesting a replacement owner's manual. For a replacement owners manual, please contact Consumer Affairs, 3901 Liberty Street Road Aurora, IL 60504 or 800-323-9005 7:30AM-5:00PM CST.