Toughsty&trade; 9Ch Realtime Color Video Multiplexer Processor CCTV Security Quad Splitter Motion Detective with Loop-through RS485 Support 9 Channel BNC Video Input and 9 Channel Real-time Display. Support Multiple Display Mode; Multi Channel Freezing Function; Auto Sequential Switching Support 1x video output for monitor and 1x video output for VCR in the same time; 2x Digital Zoom Display Support Video Loss Alert; Support Loop through Function Support PC Control via RS485 or RS232 interface