... touch-button, convenient record of queries, the standard TCP / IP communication can be cross-segment, cross-gateway network, fast, U ... ; * Fingerprint Collector: ZK2009 super fingerprint instrument; * means of communication: RS232 , RS485, U disk to download;· TFT: 3-inch ... set a variety of regular rings;Standard TCP / IP communication protocol, enabling cross-segment, cross-networking gateway;