An FM transmitter is a portable device that plugs into the headphone jack or proprietary output port of a portable audio or video device, such as a portable media player, CD player, or satellite radio system. The sound is then broadcast through the transmitter, and plays through an FM broadcast band frequency. Purposes for an FM transmitter include playing music from a device through a car stereo, or any radio.
FM transmitters are usually battery driven, but some use the cigarette lighter socket in cars, or draw their power from the device itself. They are typically used with portable audio devices such as CD or MP3 players, but are also used to broadcast other outputs (such as that from a computer sound card) throughout a home or other building.
Both mini and low-power FM transmitters have such limited power—less than 1 watt—that they pose no concern to communications regulators. On the other hand, high-power or professional FM transmitters that are commercially available—some with as many as 35 watts of power—theoretically have the capacity to make anyone a radio broadcaster. This could pose serious concerns with regard to interference and communication jamming, and by 1998, the availability of FM transmitters forced the FCC to at least consider the idea of legalizing low-power transmission. The concept has been under consideration for some time, but many would-be broadcasters are as likely to choose the Internet as a simpler, non-interfering environment in which to operate a radio site.
Most electronic retail stores sell several different models of FM transmitter, including generic brands, which may vary greatly in price, even though quality of audio is indistinguishable. However, the signal strength varies. Even though several models of MP3 player have built-in FM receivers; other models have had built-in FM transmitters to eliminate the need for a separate device. Some cheaper brand units can exhibit very poor audio quality with sibilance (distorted T and S sounds) and poor stereo imaging.
This product allows for very clear music, with good sound quality through your iPod. Also, it scans and sets your presets automatically for the radio stations that will work best according to where you are at (you can choose to turn this option off if you’d like). I have nothing negative really to say about it, other than I had to read the instructions to understand how all of the little options worked.
A few popular whole house transmitters would be the Motorized hoist FMT Digital FM transmitter, iRiver, Whole house and Cellular Black Container. They can be purchased at pc as well as electronic shops.