4CH Video 1CH RS232 Data 1CH Alarm Switch Video Balun Fiber Optic Media Converter Transmitter Receiver Extender for CCTV Camera with Free Cable Tie
4ch video+1ch bi-directional RS232 data+1ch alarm switch * NTSC, PAL or SECAM Video Compatible * No EMI, RFI, Cross Talk or Video Distortion and no ground loops * LED Indicators for Instant System Monitoring * 1 year warranty on parts and labor; with a free smartdealspro cable tie.