BIRUGEAR Black 3.5mm FM Transmitter Car Charger for LG Optimus F7 US780
The transmitter works as advertised, however it lacks signal strength when dialed into the unused FM Station of choice.  If one turns the volume ALL THE WAY UP! on your WALKMAN or BLACKBERRY, you can hear the music ADEQUATELY.  To compensate for the lack of volume and clarity, I also needed to increase the volume control on my car stereo and add some bass to the music in order to get to an adequate volume AND TONE for my discerning tastes. If there is a signal booster out there built into one of these trans