1、The password can be arbitrarily combined by 1‑10 digits, large password amount, reducing the reopening rate. 2、The password can be set and changed by the user's password, and it can be automatically saved when power off, never be lost or broken. 3、Enter the wrong password 3 times in succession, an alarm will occur. During this period, enter the correct password and press the OK key to clear the alarm. Enter the wrong password 5 times in succession, the alarm will continue for 60s and the keypad will be locked. After 60 seconds, enter the correct password and press the OK key to clear the alarm. This feature prevents others from cracking the password. 4、Low battery reminder, when the power is low, there will be "di, di, di, di" 4 sound prompt when unlocked, and the lock can be unlocked about 100 times before the battery is exhausted. 5、Public functions and private functions can be switched between each other, meet your different needs. 6、Garbled or forgotten passwords can be initialized with the administrator password (the administrator password needs to provide the lock number on the side of the product to obtain from us).