Indoor reception presents its own unique "multipath" problems due to metal used in building construction. Furniture and even people in the room can affect reception. The Magnum Dynalab Silver Ribbon helps avoid that problem by allowing the user to "focus" the antenna on either the main or a strong, reflected signal.
The functional, bright-metal elements may be adjusted by simply pulling upward on the center adjustment knob. This provides a precisely-tuned element at the proper impedance for each receivable FM station on the band, thereby maximizing reception. And it's tunable across the entire FM Band!