Full online and offline operation; Supports 30,000 active credentials, 30,000 PIN codes, 128 access groups, 128 access areas, 128-time zones, 64 holidays and 64 NG Smart Links for automation; 20,000 non-volatile, FIFO, records the event log while offline; Expandable with MD-IO84B I/O expansion for additional 8 inputs, 4 outputs OR the MD-D04B 4-reader expansion for additional 4 readers with 4 inputs, 4 outputs; Dimensions: 364 X 264 X 87.4 mm; Using AxTraxNG Server,