The AD-12 is a passive UHF antenna divider/combiner supporting 1-to-2 or 2-to-1 configurations for multi-receiver systems. It distributes one antenna signal to two receivers or combines two antenna signals into one receiver, offering flexible configurations for multi-channel reception. Compatible with MPB-30 booster and MP-10 power supply to integrate long-distance antenna signals and minimize cable loss. Passive distribution and power isolation design reduce ground loop noise and enhance system stability.