... ,Time Attendance,Time Clock 2.8 inch TFT Color Screen USB Fingerprint Biometric Time Attendance YET-UC50 Technical Parameter: Product RFID ... per users Access Mode Fingerprint,PIN Communication Protocol RS485, USB-Device,USB-host,TCP/IP Operation Voltage DC5V Identification Time Less than ... Language optional English,Chinese 2.8 inch TFT Color Screen USB Biometric Fingerprint Time Recorder YET-UC50