SA-105 @ Mortise with there latches, higher security @ Three independent unlocking: PIN, card or Mechanical Key @ Capacity: Maximum 120 fingerprints @ Allow to erase single fingerprint or group fingerprints @ Rotating outside/inside lever can lock deadbolt @ Blue background light, convenient for night use @ "Normal open"Status can be set @ Operated by four AA alkaline batteries, with low voltage alert @ Standalone, suitable for office, meeting room, residence etc.