There’s a lot of technology in that headline and I think I’ve figured it out. The Wireless Car Bluetooth FM Transmitter connects to your car stereo via FM transmission. The nifty bit is the range of inputs it can accept. First it’ll connect to your bluetooth enabled phone for use as a handsfree, presumably there’s a microphone somewhere. It will also accept the A2DP Bluetooth profile so you can stream stereo from your phone to the car stereo. Next, it has an SD card slot so you can stream your MP3s through your car stereo via the FM transmitter or play music via a USB flash drive. If all that’s not enough there’s even a ye olde 3.5mm to 3.5mm stereo connection to your MP3 player. It’s all powered via the cigarette lighter socket and there’s a remote control. Now all you need is some space on the FM band and you’re sweet. Priced around US$51 from Uxsight.
Car MP3 Player with wireless FM transmitter allows you to enjoy the MP3 music in your car, truck, boat or RV freely without having to spend money to buy many CD discs or upgrade your car stereo. Advanced noise reduction and echo cancellation to dialog clearly. FM channels, LCD display, support flash disk / SD / MMC card. Remote controller provided, support DC 12V power supply.