4 ways to open: Passwords(up to 56), RFID Cards(up to 56), Remote Controls(up to 5), Mechanical Keys.(Code Length: 4-8 digits, default 6 digits). 4 digits or 6 digits can be added or switched at random. Package Include: 1 X lock, 1 X remote, 2 X mechanical keys, 2 X rfid cards, user manual,12-month warranty. Unlock with Remote Control, M1 Card, Pass Code or Mechanical Key,Voice Navigation While Operating,Contact Seller For Video Guide.1020 Total Possible Users and Quickly Add or Delete User Pass Code, M1 Card or Remote individually. Reversible lever: Lever is reversible to fit both left-handed and right-handed door. Default for right-handed door, but you can switch the lever for left-handed door with a small tool. Not waterproof, mainly used for interior doors and wooden doors. Standard Latch(2 3/8\" and 2 3/4\" Both Available in the package).Package Includes 1 Remote Control(27A 12V battery required), 2 M1 Cards, and 2 Metal Keys Low power reminder: 4 AA alkaline batteries can last about 10 months. When the power is less than 4.8V, there will be an alarm. If the power is off, the mechanical key can always unlock. As well as a Anti-peeking function, you can add random code after your real code to prevent others from peeking your code.There are some relevant videos of installation & operation of the door lock on youtube, contact us if necessary. › See more product details