Feature: 1. Digital key: The code lock uses a physical digital key with stable performance and flexible and convenient use. 2. Custom password: The password is deleted and formulated by the user to minimize security breaches. 3. Two unlocking methods: password unlocking and key unlocking. Fully mechanical password keys, anti-card door tab and more secure anti-theft. 4. C Reset Button: When the password is entered incorrectly, you can press the C button to enter it again. Anything other than the C button can be set as a password. 5. Concealed installation: The installation is convenient, and the old spherical door hole can be used during installation without additional opening. Specification: Item Type: Door Lock Material: Zinc Alloy Battery: 4 x AA Batteries (Excluded) Factory Unlock Password: 123 Factory Management Password: 123456 User Capacity: 10 Groups Method of Unlock: Password, Key Bolt Size: Approx. 60mm/2.36in or 70mm/2.76in (manually adjustable) Suitable for door thickness: approx. 38-48mm/1.5-1.89in Low battery reminder: 4.8V low voltage alarm reminder Door opening direction: regardless of left and right directions Package List: 1 x Door Lock 1 x exterior door lock 1 x lock tongue 1 x lock box 1 x lock 2 x key 10 x screws 1 x back cover 3 x nut tube 1 x dimension figure 1 x manual