Rooted from talented design in Taiwan. The square latch will flip and insert into strike plate when close to the door.
Double-drive motors (a motor and an electromagnet). If you use only one of them once a time, its service time will be one time longer than the single motor design ones. If you use both of them together, one is being used while the other is backup for usage.

Strong reliablility
Without mechanical keys for the design of double circuit boards and bouble battery boxes. In this sense, it's true to its name, an electronic lock with very high safety factor.
The first European standard lock body with battery boxes.