Low PIM Attenuator, especially high power units, are often used by in-building passive and active DAS systems. A stable PIM performance becomes critical for broadband today. Radiocomm unique design process provides -165dBc Extra low PIM and right heat dissipation when high RF power is added to the attenuators. The ultra-wide frequency range (520-3800MHz) covers both public safety and 5G Bands, which allows the use with multiband antennas and leaky cable systems and in wireless base stations.