FM Transmitter Buying Guide

Here’s what to look at when shopping for FM transmitters, including pre-purchase considerations and relevant FAQs about the product.
Pre-Purchase Considerations:
Here’s what to consider before buying FM transmitters for your vehicle and determine which is going to be the best FM transmitter.
Compatibility Requirements:
Are you looking for Bluetooth, USB music source, auxiliary cable, microSD, or another type of compatibility with your in-car FM transmitter? These are all available options across the market, but not every type of connectivity is available in all FM transmitters.
Whether you have the most current smartphone or want to plug into an older MP3 player, it’s important to note what type of compatibility you require before shopping for an FM transmitter.
Style and Fit:
Many FM transmitters are bulky with large screens and lots of features that won’t work for every vehicle configuration. Some of us prefer more streamlined devices that are less likely to attract the attention of unsavory types.
Whatever style you’re looking for, consider that alongside the fit your vehicle requires. For cars or vehicles with cigarette lighters in the middle of the center console, that might not be an ideal place to put a microphone-enabled via Bluetooth FM transmitter device since it won’t work well for voice calling.
In contrast, a bulky FM transmitter device won’t be a good fit if it’s too close to your steering wheel and prevents you from operating the vehicle safely.

Questions & Answers
Here are a few FAQs about in-vehicle FM transmitters for Bluetooth FM radio compatibility.
How Do Bluetooth FM Transmitters Work?
FM transmitters that use FM connectivity rely on the radio station in your car to transmit sound through your speakers. FM transmitters connects to your car’s power source to turn on, but then finds an open radio station’s airwaves to “share” with your car radio.
With both sources tuned to the same station, FM transmitters can then relay the music from your device to your car stereo. For this reason, most FM transmitters will have some type of interference, but this can vary greatly depending on where you live. In general, highly populated areas have fewer available radio stations for this purpose.
Are Wireless Bluetooth FM Transmitters Good?
The short answer is, in some cases, they may be the only option. If so, then this question is often moot! But in general, yes, wireless via Bluetooth FM transmitters are good. The overall sound quality depends on where you are and what FM station you use. But, yes, you can achieve decent sound quality with a transmitter via FM channels.
Will Bluetooth FM Transmitters Drain My Car Battery?
Yes, Bluetooth FM transmitters can definitely drain your car battery. Very few Bluetooth FM transmitters utilize an on/off switch, and most manufacturers recommend removing the device from the outlet when you turn the vehicle off. Then once you turn the vehicle back on, you can plug the unit in again.
Some devices do have on/off switches, however, and this is a highly desirable feature to look for in a FM transmitter.
Final Thoughts:
No matter what type of smartphone or music player you have, there’s a Bluetooth FM transmitter to get your music playing, your device charging, and your calls coming across clearer than ever. And with this list of the best options out there, you won’t need to invest in a new car stereo or other pricey upgrades. We hope this guide and reviews helps your find the best FM transmitter for your needs.
Other Car Technology Items:
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