... Operating system: Linux Communications: RS23 This kind of fingerprint access device features: 1. User Capacity: 2200,2. Transaction Storage: ... 4. Communications: RS232 ,RS485,TCP/IP( Standard ) USB-DEVICE 5. Identification time:≤2S,FAR≤0.0001%, FRR≤1% 6 ... Humidity: 20%-80%9. Standard Function :Workcode, Webserver, function key, schedular bell, short message10. Optional: backup supply, Printer, WIFI ...