Want to use your portable music player in the car? Monster's RadioPlay™ wireless transmitter makes it easy. Just plug the RadioPlay into your vehicle's 12-volt outlet (or cigarette lighter), then connect its miniplug cable to the headphone jack on your portable. Choose one of the eight transmitting frequencies, tune to that frequency on your FM radio, and enjoy music from your portable through your car system.

You can use the RadioPlay transmitter with any portable that has a mini-jack headphone output, including CD players, MP3 players, DVD players, and laptop computers. Gold-plated contacts maximize signal transfer for the best possible sound.

Product Highlights:

  • compatible with any portable with a mini-jack headphone output
  • 37" cord plugs into cigarette lighter (no batteries required)
  • one-touch FM channel selector
  • 8 FM frequency options (88.1, 88.3, 88.5, 88.7, 88.9, 89.1, 89.3, 89.5)
  • 24k gold contacts maximize power transfer and resist corrosion
  • warranty: 1 year
  • Our 60-day money-back guarantee

Monster RadioPlay™ Reviews

Average Customer Review:

15 reviews
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Monster FM Tuner

Written By JJ, El Paso, TX on Saturday, April 18, 2009

Crutchfield Customer Review (What's this?)

This thing has worked well for me...so far. No static or bleedover. I would recommend this product.

Monster RadioPlay™

Written By Mike, Saint Louis, MO on Thursday, April 24, 2008

It was flimsy, but poorly built, broke in like 3 weeks, and the static was very irratating. FM transmitters are a waist of money, just buy a direct line, or just get a deck with auxillary input. This was wack....would not but as a gift for a person for christmas or their birthday.

Worked fo rme

Written By Eunice, Clarksville TN on Thursday, February 14, 2008

Crutchfield Customer Review (What's this?)

Worked great for me. VW Beetle, 2000. Much better than the CD changer I had put in at the dealership. Simple to use, not alot of pieces to lose. 5 stars. Way to go Monster!

Not for me

Written By Gary, Florida Keys on Saturday, August 11, 2007

Crutchfield Customer Review (What's this?)

From my experience and reading other reviews I think if you have a FM antenna in your back window this is not the option. Bleed through was not an issue in my area but the static and whining was unbearable. Crutchfield took it back no questions. Guess it's a cassette adapter for my old ride.

Not Bad.

Written By James, Northern MN on Saturday, February 10, 2007

Crutchfield Customer Review (What's this?)

Even after reading the reviews I was leary about buying this item, but since I will be getting rid of our vehicle soon I didn't want to waste money on a hardwire kit for my ipod. So I went into this expecting nothing, but I figured since it was "Monster" brand it had to be the better of the ones I have seen. SO I bought it and I have to admit its not half bad. I notice its better to keep the I pod at 3/4 volume otherwise I run into static. Also if you hit a strong enough radio station it gets static but up here in MN the is not much for low frequency stations. All and all I like this product, I think I made a decent purchase.

Great product

Written By Jamie, Leesburg, Virginia on Wednesday, May 31, 2006

I tried this out first and I like it a lot. I recommend this product. The signal fades once or twice for me in a three week period but I recommend this. The sound quality is good but sometimes not.


Written By BHBarr, Charlotte NC on Friday, February 24, 2006

Save your money for a hard wired interface. Even where there is little station clutter the reception is terrible. I was stuck for the last year because noone made an interface for a '05 Honda S2000. Now its avaiable and this is going in the trash.

Better than others

Written By claycope, Seattle WA on Friday, August 26, 2005

I've tried 4 different FM transmitters in my 1996 Maxima. Although this product worked much better than the ITrip and a few others, there was still a good amount of interference.
Do note that my maxima has a rear mounted antenna which has a profound effect on the products performance. Of the FM transmitted I tried, the Monster product was the best performing product.
After struggling with wireless options, I'm going wired!

Let Down

Written By Adam, Buffalo, New York on Wednesday, August 03, 2005

I purchased the transmitter with high hopes but was soon let down due the poor sound quality. The price is far too high for something that works like this. Regardless of the amount of channels that are prgrammed into it, they all sound the same. The sound quality is murky and static filled at times. I suggest, if you can, just hardwire the player to your car.

Monster RadioPlay™

Written By Walter, Layton, UT on Wednesday, July 06, 2005

I've tried other wireless FM transmitters in my car and I have found this one to be all that I am looking for. Not once have I gotten a bleed through from radio stations in my area where as the other ones I've tried did.

Get better

Written By Brady, Pittsburgh, PA on Thursday, May 26, 2005

I bought this item for 50 bucks. I thought it would be amazing spending a decent amout of money for it and it wasn't. The reception of this FM transmiter is terrible! I can hear the music and will be fine in certain open areas but gets frusterating when you move 10 feet from that spot and there is static. Save 50 more bucks and by the iPod dock!

Not good enough. In fact, not good at all!

Written By azazel, San Juan, PR on Monday, March 14, 2005

Well, I bought this mosnter transmitter about a week and a half ago. Tried it a couple of times and at the time it's collecting dust in my room. Audio quality is not good, I got a lot of interference. A friend of mine got it too and he says that due to long periods of interference, his front speakers were blown. I currently have a FM modulator wired to the car's antena and it's working a lot better.

Monster RadioPlay™

Written By Jim Margherio, Bethalto, IL on Wednesday, March 09, 2005

Crutchfield Customer Review (What's this?)

Like the last review said. You would be better off buying the full station one not this one. The sound is ok on this product but, the interference is strong on this and in my area i can only listen to 1 of the stations on this because the rest of them all broadcast. spend the extra 40 bucks to upgrade. I will be returning this product and getting the other one.

Great value, great accessory!

Written By Jean, Rochester, NY on Thursday, February 24, 2005

This is a great product. Big advantages to charging and broadcasting the iPod signal. Of the radio transmitters that we've tried, this one had the best performance, partly due to the larger number of stations it can broadcast on. (This allows a lot more flexibility if you live in a market with a lot of radio stations, even on the low end of the dial.)
Admittedly, the sound is similiar quality to an FM radio station, so not the normal audiophile sound Crutchfield customers appreciate, but it's one of the best solutions we've found without hardwiring. It's also great to take on trips when you are renting a car, as the iPod gets charged and you can listen to your music or "books on digital" in rental cars as well as your own.

Not the ideal way to listen in the car

Written By John, Los Angeles, CA on Thursday, February 24, 2005

Crutchfield Customer Review (What's this?)

I have been dissapointed with the sound quality of this product. I don't think it is becasue the product that is bad, it is just the technology. Even with 8 station presets, becasue you are still listening via your FM radio, you can easily pick up interference. Also, there is a dramatic loss of sound quality in the FM transfer. The quality is no different than listening to an FM radio station. You are far better off either wiring directly into your system, or using a $20 tape adapter.

Hands-on research

What's in the box?

Download owner's manual

  • Cigarette lighter charger with attached 37" cord and in-line FM transmitter (cord is terminated with a minijack stereo connector)
  • User Guide & Warranty Information sheet

Product Research


Overview: The RadioPlay provides non-stop portable operation by offering the convenience of powering your portable in your car. The RadioPlay plugs into your vehicle's 12-volt outlet (or cigarette lighter), then connects to the headphone jack on your portable. The FM Transmitter lets you use your portable to listen to your favorite music through any FM stereo receiver.

Modulation Frequencies: You can set the modulator to transmit on any of the following frequencies: 88.1, 88.3, 88.5, 88.7, 88.9, 89.1, 89.3, or 89.5 MHz.

Our Product Research Team

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