High Speed Memory measure to ensure records never lose when power interruption. Mass memory capacity for storaging photoes and records. Fire and alarm linkage Multi-card unlocking, supporting card unlocking, password unlocking, and card+password unlocking. Support remote unlocking, offline and real time supervision. Alarm for invalid card swiping, long time door open and illegal break in first card unlocking. Widely used for professional users such as banks,cash houses, prisons telecom stations,plice stations, integrated fire controls, anti-passback and anti-tail. Emergency double locking based on internal and external validation. Flexible user rights settings, quick settings, support for multi-user supervision. Normal &multi-time attendance management.Convenient to check and query,report exported to excel which revisable and printable report form,unlocking at definite time. If there is no connection with the expansion board, only the software interface will alarm and drive the computer loudspeaker. If connected to the expansion board, it can be alarmed by hardware, and if connected to the strengthened expansion board, it can be alarmed safely.