The Kuryakyn Tune Trapper is a hidden FM antenna that works! Mount it anywhere (in almost any vehicle, boat, RV or motorcycle) in any position, in steel or fiberglass; it"s flexible, can be bent 10 to 20 degrees, & works awesome inside H-D fairings! the Tune Trapper is a full 1/2 wave helical dipole antenna, hand tuned to resonace with special instruments & requires no ground. It uses 95% braided shield cable for virtual elimination of EMI electrical noise caused by engines, fans, wipers, etc. These hand-tuned USA made antennas require no power; your radio has all the preamp it needs built in, it"s just looking for a properly tuned antenna to make it rock.