Specification:Battery: 4 x AA Battery (Not included)A. Change the management password:Original management password + key key 1+ New management password + key key New management password + key keyB. Add user password:Management password + key key 8 + number (001-200) key key User password Key key user password Key key ; can be added continuously1, delete the user password:Management password + key button 4 + number (001-200) key button No. (001-200) key button; can be deleted continuously2. Delete all user passwords:Management password + key button 0 + key buttonNote: Enter the wrong password lock keyboard for 7 minutes in succession for 7 minutes.Add a temporary user (operating normally) Add a temporary password (in single-on mode): New temporary password + key button New temporary password + key button; door lock closed C, system settings: 1. Switch between home and public modes: Management password + key button 7 key button 2. Switching from single-on mode to dual-on (combination) mode:Magement password + key button 6 key button 3. Double-open (combined) mode is switched to single-on mode: Management password + key button 5 key buttonFront lock Size: 10.8 x 5.5 x 2cm / 4.25 x 2.17 x 0.79 inch (appr.)Rear lock 14.5 x 6.5 x 2.2cm / 5.71 x 2.56 x 0.87 inch (appr.)Notice:Product unlocking method: digital keys and 125khz ID card (ID card not included)Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.