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1. A variety of working modes are optional, suitable for different applications.2. When the internal battery voltage is lower than 3.6+0.1V, the “red light” will flash 3 times after the switch lock is completed. It is recommended that the user replace the battery as soon as possible.3. Attack protection. Entering the wrong password for 3 consecutive times or entering 5 fingerprints will activate the attack protection, and the electronic lock will be locked for 3 minutes.