Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: What is your opinion of the FM transmitter? My main usage would be to stream the calls and my music to my radio.
Document: What it lacks is a physical audio input so you can attach your MP3 player directly. It can only play music via Bluetooth which may not give you the full range.As a Car Audio Transmitter:The FM function is not a radio receiver for radio stations; it is a transmitter to stream from your audio player/MP3 phone to your car radio using the FM.
It's good as a bluetooth speakerphone (but there are cheaper alternatives).The FM transmitter simply does not work. I do not know what makes it so difficult to connect with the car radio. At best there is sound with background static, otherwise it's just static with no sound at all. In any case you can't stream music or pandora radio from the phone to the car speakers. Hm-m... this thing goes back to Costco...
I use the FM transmitter to have my calls go through the radio. I can hear my calls clearly. It is also nice to be able to stream Pandora through my radio speakers so I don't need to search for radio stations on longer trips. This is a great product and an inexpensive alternative to installing a stereo system that might meet the same need.
Also on the unit are buttons to raise/lower/mute the volume as well as FM and Voice buttons.The FM button lets you turn FM mode on or off. FM Mode will let you pass calls/music from your smartphone through the FREEWAY and into your car radio. I don't think there's any need to stream calls through the radio, as the whole point of a FREEWAY is that it's a speaker phone. And the three sparkers on the device are pretty nice for their size.
For phone calls it works fine. The FM transmitter didn't work well in my car, though I think it largely depends on the car. I didn't expect the small speakers would work well for music, but I was hoping they would work for audio books. That didn't pan out.So it didn't really work out for me.Sigh...
So far I like this, I generally use this for it's FM transmitter/blue tooth so I can stream music from my phone to my stereo. That in mind I wish they had a track advance/skip, pause/stop and play/resume button on them.
This thing does everything great except for one thing, the FM tuner. I just can't find a station where I do not get a lot of static. It is the easiest thing in the world to use - I didn't even have to read the manual, and this was my first foray into bluetooth. The features were fantastic, the internal speaker is good enough for phone calls and spoken words. In my opinion, music requires better speakers though.
Occasionaly, I stream audio from my Samsung Galaxy S 3 to my FM radio and it sounds okay. The sound is not as good as the regular FM Radio, but when I want to listen to something else, it comes in handy. I have had some complains from people I call, that there is occasionally a lot of background noise on the other end of the call. I am very happy with and feel safer using the hands free FREEWAY while making calls from my car.
I had much higher hopes for this product. My main goal for this purchase was to make/receive calls and play music hands free. The set up was easy. At first when I would use the voice commands it would mess up occasionally but I know that happens with voice recognition. Then it started calling random people in my contacts when I would use the command &#34;play music&#34;?? I could hear calls coming in, but they said they couldn't hear me very well.
I never understood why anyone would want to stream music to a bluetooth speakerphone in their car when cars have stereos in them. Well, this is still a far cry from a real stereo but it does sound nice, and incoming calls are easy to understand.Outbound Call Quality (i.e., how you sound to other people)==============This is where the testing came into play.
Answer: The FM transmitter is strong and easy to use.  I have used other devices with an FM modulator (transmitter) and some stations tend to override the modulator.  I have not had this problem with the Jabra Freeway.  The sound quality is excellent through the FM.  Phone voice & strength is also excellent when not used in conjunction with the modulator.  As a musical speaker it is ok.