Samsung SHS-DH537 Digital Door LockQuick Overview Samsung Digital Lock (Lever Handle Type) Cards or User Password (up to 100) Master Password for enrollment and deletion Able to delete a card or a user pin code individually (or delete all) Random numbers display prior to entering password Double verification for higher enhanced security (optional): Password + Card Anti Panic Egress Safe Handle (Children Safety Handle) Anti theft alarm Automatic re locking with adjustable locking time