... 3.Communication:RS232, RS485,TCP/IP,USB-DEVICE iclock200 Professional Color Screen Fingerprint attendance is self-service operation, enormously convenient for users ... : Communication: RS232, RS485,TCP/IP(Standard), USB-DEVICE, USB Host8. LED: Red, Green9. LCD: 128*64 Blue backlight10. Identification time: ≤1s11 ... : ≤0.0001%12. FRR: ≤0.01%13. 3.5" Digital Color TFT screen