... .User capacity: 20000 users Access controller functions: offline operation, real time supervision, photo display, mass storage ... be exported to excel file, card+password unlocking, alarm for long time unclosing, alarm for invalid card swiping; first card unlocking ... distance 80m)Inter blockNoAnti pass back and tailYesFire control and alarm linkageexpansion board is neededAlarm for long time door open, ...