Adapters, connectors, surge protectors, and ceiling-mount antennas, used to provide PIM (Passive Intermodulation) protection and performance to meet mobile device data rate and video streaming demands on DAS and LTE/4G bands, meet low-PIM standards with ratings of < -160 dBc or < -150 dBc. These products are specifically designed for in-building wireless systems, such as distributed antenna systems (DAS) networks, used to distribute cellular and Wi-Fi signals throughout building or area.