Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Dose it cover the full range of frequencies, 88.1 to 107? or a limited range, or just a few preset ones.
Document: This works really well, generally quite happy with it.A few things I wish I had known before buying:+ although advertised as &#34;full range&#34;, its range is 88.1-107.9. I was hoping to use 87.9, but this isn't supported+ after a thirty seconds or so of no signal the transmitter turns itself off.
Very clear sound, it comes out a little low on volume but nothing more. I found 88.1 was the best station.
This unit seems to work fairly well. It's easy enough to set up and use. I found that it does better at the higher end of the frequency range, but that may be due to the broadcasting stations in my area. It's worth experimenting with different frequencies to see what works best.
Nothing special but works OK as long as channel it's on is clear. About like every other one I've ever had except this one cost about 1/3 of the cellphone store ones. As far as I can tell after a couple of months of use it's just as good.
My ear is still aching from the radio station suddenly blasting through at full volume. It also only goes down to 88, no 87.9, which would have been perfect. In fairness, perhaps my phone doesn't play well with this model. I use an LG Windows phone. All in all I'm very disappointed and I only pray the company will give me my money back.
Honestly there are much better FM transmitters for the price range. Spend $50 and you can upgrade to a totally wireless excellent quality one, $25-$30 for a great quality wired one, etc. This one works, but its not a very good product for reasons that go beyond sound quality.Why you should avoid:1. It auto turns off when it stops getting a signal, which means your ears are blasted by radio static the moment this happens.
I recently purchased an iPhone 5 and wanted to listen to my Spotify playlists in the car. Without any connection available between my iPhone5 and my car I went looking for options. The Excelvan wireless radio adapter arrived from Amazon and I unpacked and connected to the car power and to my iPhone. I tuned Excelvan to radio station 88.1 (the station with the most static so least competition with a local broadcasting station) and was surprised how clean the sound was.
I have purchased other more expensive ones and the pale in comparison to this one. Transmission is very clear with practically no static. Loving it.
It didn't work after i tried many frequencies. No sounds came out on the radio. don't waste your time buying this product.
works great , wires are a bit messy . when you are on the road  you might have to change frequencies to get best reception
Answer: Yes, the entire range.