This is Yale Unity ALL-in-One Entrance lock kit, which includes Unity entrance lock (YUR/DEL/1/SIL), Unity screen door lock (YUR/SSDL/1/SIL), Smart Keypad (05/301000/BL) and Connect Plus Wi-Fi Bridge (AYR-BDG-CB2-ANZ). When installed with a Yale Connect Plus Wi-Fi Bridge, the Unity Entrance Series features DualDoor Technology *. With a single command, users can operate both the security screen door and the main entrance door together. The door lock or unlock command operates both locks (Unity Security Screen Door Lock and Unity Entrance Lock) in a sequence. The Yale Homeecosystem can integrate your Unity Security Screen Door Lock and Unity Entrance Lock together to operate both locks with a single command. The technology works seamlessly, to provide ultimate user convenience. This will allow the user to enter the home without keys and saves the effort of operating the screen door and main entrance door locks together. The Unity Entrance Series works with the Yale Home APP, giving you total control over your lock via your smart device. You can grant access to others, keep track of visitor access and so much more. By adding Smart keypad, you will be able to access your lock via PIN code