Upgrading the old to the new is now easier with The Keyless Digital Deadlatch Upgrade Kit. Allowing you the ability to upgrade your mechanical Lockwood 001 or 002 or Whitco W75 series deadlatch, to a digital lock within minutes. Easily fit the lock by removing your external mechanical faceplate and replacing it with the Digital deadlatch.By upgrading to the Digital Deadlatch allows users to access their home via PIN code without the need to carry their keys. Users can add up to 20 user PIN codes and 20 key tags/cards, allowing shared access to family members, cleaners or visitors. PIN Codes can also be time controlled for a period of up to 24hrs allowing visitors to access the lock within the given time.The Yale Digital Deadlatch is powered by 4 x AAA alkaline batteries notifying users once batteries are low. The lock also has a 9V power backup to ensure you never lose power.*Mechanical lockset is not included