fingerprint access control with built-in back-up battery, access control interface for electric lock, door sensor, ... with GUI interface for ease of useBuilt-in backup battery supports approx 4 hours continuous operationTCP/IP, RS232/485, USB ... functions: workcode, SMS, DLST, Self-Service Query, Automatic Status Switch, back-up batteryOptional function: ID/Mifare/HID reader, extensible barcode relay ...