Features:

• MP3/WMA FM Modulator with SD Card Slot, USB Port, and Audio Input
• Plays All your Audio Devices Wire-Free through your Car's Stereo System FM Radio
• Easy to Read Display Shows Pre-Set FM Stations and ID3 Data Information- Song, Title, Artist, Album, or Genre* *ID3 data must be present.
• Large Buttons and Adjustable, Six-Postion Body allow for easy operation

Editor Reviews:

Product Description:
FM Transmitter with SD? Card Slot and USB PortID3 displays song title, artist and albumDigital LCD displayLast station recall and last song played15 FM frequenciesStereo auxiliary audio input jackIncludes auxiliary cable

Rating : - VR3 vs SoundFly SD
I've had an VR3 FM USB Car Transmitter for two years. However, there were things that I found most frustrating when using it and I didn't realise this until after I'd purchased it.

VR3 MP3 Player FM Transmitter frustrations:

1) It wouldn't remember where I last was listening to.
2) I couldn't fast forward nor rewind. Arrgh! You could only skip between tracks. This was frustrating because I have a habit of rewinding to listen to parts of my audio tracks again and again and of course I can't fast forward through averts. It was especially frustrating because of point 1 above as I would always have to start listening from the beginning of a track. Particularly annoying when listening to long tracks.
3) No remote - Please note most FM transmitters don't come with FF or RW functions on the remote's either.
4) It was white and it was ugly.
5) Limited frequency range. A lot of these devices only allow you turn use the upper and lower FM frequency ranges.
6) It takes USB dongles and SD cards but the SD cards are limited to 2GB.

I've now purchased the SoundFly SD:Soundfly SD WMA/MP3 Player Car Fm Transmitter for SD Card, USB Stick, Mp3 Players (iPod, Zune)

1) The SoundFly SD remembers exactly where you were last listening to. This is so refreshing as I can just turn off the car and when I next climb back in and start the car, with the SoundFly SD plugged into the car lighter socket, it just starts right of from where I left last. Awesome! Bear in mind I have a new model car less than four years old, but a lot of these devices just die when a car is started and the device has been accidentally left in. I've not had a single problem with using the Soundly this way, and I believe I have no reason to worry about it. You even have a bookmarking facility.
2) I can fast forward and rewind to my hearts content. Even with the remote.
3) The remote is is actually quite handy, especially when driving. You can certainly use the controls on the device itself, but the remote is easier. It's not too difficult to remember the position of the keypad buttons, so using the remote while driving is quite easy. Don't crash.
4) This FM transmitter is black. The device itself is a heck of a lot more attractive than the VR3 I have. It's even smaller.
5) You can tune into all the FM frequency range in single steps, so there's no shortage of places to find a gap in the FM range. The Soundfly can remember up to seven bookmarked spots. As for the strength of the FM transmitter, it's certainly no worse than the VR3. But unlike the VR3 I have a much broader spectrum of FM frequencies to try to find a clear spot. Much better.
6) The device takes USB dongles & SD cards. But this device takes the High Capacity ones up 32GB.

Other points to note. You can also connect your iPod or MP3 player via the supplied cable. You also get a 10A fuse. In case you can't figure out what it's for, and it's not stated in the instructions, the device has a fuse inside the part that pushes into the lighter socket. That should blow before the device does. Handy if you leave the device in all the time. If the device stops working, check the fuse. You unscrew the end. The instructions are clear, but one point of note is that it doesn't show you how to change the fuse.

I'm so happy with the SoundFly FM transmitter and highly recommend it to anyone who'll listen. It's much better than the VR3. The only thing I can think that is lacking with this is Bluetooth. I would love for this device to be able to communicate with my phone or Bluetooth headset (if I had some), or or an MP3 player that had Bluetooth.