2.Low voltage alarm when lower than 4.5V, external battery box&adapter for emergency power supply, etc.
3.Two ways for power supply: 4*1.5V AAA battery & 6V DC, if customers need, it also can be used in 12V DC.
4.Hooks suit for various applications with two installation way: vertical or horizontal.
5.Customers can used the mobile APP to unlock the lock.
