Use a DC 12 V power supply and UTP to send the FAL/NTSC HD CVI/TVI/AHD/CVBS video signal. Passive video balun is compatible with HD CVI/TVIAHD cameras up to 400M. Use a passive video balun for CVBS cameras up to 800 meters. Installing the screwless Press Terminal block is simple. Easy to use, with a knob switch for brightness and a dial switch for contrast. BC male connector, the smallest size available on the Chinese mainland. Connect directly to a DVR, video splitter, matrix, or monitor; it has a common-mode anti-interference feature that is lightning-proof. greatest cost-performance ratio.