Digital Door Lock Keyless Keypad Coded Smart Room Combination

Features: Privacy Password Input & Safe Design: enable to unlock the door even when you adding any numbers before/after the correct password. and the smart keyboard is designed with traceless keys, thus prevent the password known by others.  User Management Capacity: the electronic lock is capable of storing up 10 access codes, 1 manager password + 1 passage password + 8 user passwords.  Low Power Consumption: the inner battery compartment and the backup battery pack are both powered by 4pcs 1.5V AAA batteries (NOT included), and with less than 20μA static current, they can last more than one year, and it will make a continuous beep sounds to remind you when in low voltage.  Backlight 12-key Keypad: low brightness backlit keyboard makes it easy and convenient to use at night.  Reliable Quality: fine casting, modern appearance, waterproof seals protecting electronic components.  Simple & Easy Installation: adopts with standard single spring bolt and equipped with installation ac