1.Controlled by electricity, the door can be opened very quickly. 2.The inside-set controlled-circuit can efficiently avoid the man-made damage and being unlocked by the outside power-supply. 3.The inside-set controlled-circuit can efficiently avoid the man-made damage and being unlocked by the outside power-supply. 4.To unlock with the mechanical structure driven by the micro-electronics machine, instead of being driven by electrical magnetic, overcomes the shortcomings and makes the lock have a longer service-life. 5.The lock can be locked up automatically or manualy.