Samsung SHS-1321 Digital Door Lock, RIM Deadbolt, Touchscreen, Keyless DETAILS  Program up to 21 user codes and RF ID tags. Fits doors 35mm to 50mm thick. Automatic locking. Compatible with certain NFC items. Battery operated with emergency power contact. DESIGN  Samsung door locks have a sleek modern design which would complement any interior or exterior door in the residential home, apartment, or commercial business office building. EASY TO USE  Use the digital touchscreen numeric keypad to enter a password or RFID faster than you can turn a key. Shut the door and the physical sensor automatically locks the door for you. RIM LOCK  Can Install on 160/161 cylinder prep doors with minimal modification, RIM locks can be used for niche or special doors and can be installed on the right or left hand side. SECURITY  Rigorously tested construction, random security code feature, bump and pick proof, intrusion alarm, PSB fire tested and fire detection sensor, anti tampering lock out. The lock has your back.