... ,USB-device,USB-host USB Biometric Fingerprint Time Recording System Technical Parameter: Product Biometric Fingerprint Time Recording System YET-U50Optional Function EM/Mifare Card ... up to 3 fingerprints for per users Access Mode Fingerprint,PIN,EM/Mifare card Communication Protocol USB Host, RS485 ... ,Job.No.,etc. Display Language English, Chinese Biometric Fingerprint Time Recording System YET-U50