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1. emergency unlocking: when the battery is dead, the micro usb connector/3.5mm socket is used to connect an external battery box or power adapter. 1. two power supply methods: 4*1.5vaaa battery and 6v dc. if necessary, 12v dc can also be used.
2. color: a variety of colors to choose from. 1. a variety of working modes are available: suitable for applications in different places. the user can use the mobile app to control the lock. 1. low voltage alarm: when the voltage is lower than 4.5v, there will be a sound and light prompt every time the lock is unlocked. 1. when the voltage is lower than 4v, it can be automatically unlocked and cannot be locked.
2. installation method: vertical installation and horizontal installation, suitable for various occasions..syi