As shown in the figure, after installing and replacing the battery, insert a coin or similar object into the groove of the back of the smart key, and then turn clockwise to open the back cover to install and replace the battery.
After the phone is connected to the lock, enter the app page "Key Management-Add Smart Key", click "Start Add", and then close the smart key to the lock, short press once, the lock is closed, and the pairing is successful.
Short press the button twice in succession to unlock the lock; short press the button once to close the lock.
When the battery is low, short press the button, the red indicator light will continue to flash 5 times.
Long press the button for 20 seconds until the smart key indicator flashes alternately red and green, then press it again, the green light flashes to restore success. Then follow the operation guide (2) to re-pair.