HAIFUAN Security Digital Keyless Code Door Lock, Unlock with Code Card and Key(HFAM10-R-NB) Unlock with M1 Card, Pass Code or Mechanical Key,Voice Navigation While Operating 1000 Total Users and Quickly Add or Delete User Passcode, Keyfob Individually. Touch Screen, Waterproof, Excellent for Exterior Use and Interior Doors,keys, Hidden keyhole, Easy Right or Left Handle Switching, Default for Right Hand Stay Unlocked Mode Available. Keypad illumination, Standard Latch(2 3/8" 60mm and 2 3/4" 70mm adjustable) 4 AA (not included) Batteries Required. Extra card ASIN B01LERW8WU(Card Shape) or ASIN B071ND8T5T(Key chain shape) The lock will alarm when the battery voltage is lower than 4.8V, You can use keys to open the door(move away the key hole cover first). there is a small magnet in they key to do this one front panel and back panel one latches(backset:2-3/8&#034; and 2-3/4&#034; reversible) 2 cards(Frequency:13.56MHZ)) +3 keys User Manual and Necessary fitting components Diameter of plate: 2.75&#034;(70mm)*8.27&#034;(210mm) Latches with backset of 2 3/8&#034;(60mm) and 2 3/4&#034;(70mm) reversible. Handle length:5.52&#034;(140mm) Suitable for door thickness between:1.18&#034;-2.75&#034;(30-70MM) when enter into this mode, the lock won&#039;t automatically lock after open once, no need to input code every time for a busy door The keypad of this lock will illuminate when pressed, easy to see during night Voice Navigation While Operating, make it much easier when program the lock