Designed to help HF radios and receivers that struggle with front-end overload from AM broadcast interference. ^^ Lightweight and portable design, only 4 inches (102mm) in length and weighing just 78 grams. Perfect for Parks on the Air (POTA), Summits on the Air (SOTA) and Field Day. ^^ Tested up to 100 watts with SSB, CW and digital FT8. ^^ High quality C0G (NP0) capacitors and Micrometals toroids. ^^ SO-239 UHF connectors on both ends for compatibility with amateur radio stations.