Transforms your existing deadbolt into a smart lock in minutes. Replace only your current lock's interior hardware while keeping the exterior hardware the same. Easily installs with only a screwdriver. Ideal for renters — keep your existing deadbolt and use your existing keys. Replaces standard deadbolt – not compatible with interconnected locksets. Compatible with most Kwikset, Weiser, Baldwin, and Schlage standard deadbolts. Grant access to trusted guests. Family, friends, or your dog walker can unlock or lock your door via a text-based authentication process with Amazon Key.