1, Fingerprint + password 2, Adopting RS485 or TCP/IP carries out networking 3, CE approved 4, OEM ... and exits of office, factory, hotel, school, etc. • Adopting RS485 or TCP/IP carries out networking. USB flash drive upload/download ... / Normal Closed Door Open ButtonCan connect the common button, or the wireless remote controlled button Doorbell Output Can connect the doorbell Access ...