... Output and BNC Output at the same time, 4/8/16 CH Video Loop Out Optional. FeatureHigh Speed CPU 600MHz, Memory ... Output and BNC Output at the same time, 4/8/16 CH Video Loop Out Optional. Support 4 X SATA2.6 ... External ModuleYes, with USB 2.0 Port, 100MetersGUI INTERFACESupported GUI 16 Bit True ColorPTZ PROTOCOL1*RS485, Support 18 Kinds of ProtocolBACKUPINTERNALBuilt ...