The Ultimate Guide to Picking the Best Bluetooth FM Transmitter for Your Car

Bluetooth has helped revolutionize the way we listen to music, eliminating the need for wires. You find the technology in headphones, earbuds, and even FM transmitters. It provides a wireless way to connect your Bluetooth-enabled phones and tablets to such devices. 

Bluetooth FM transmitters are needed when you have no other way of connecting to the stereo system in your car. While you find Bluetooth or aux-enabled stereos in modern vehicles, older ones don’t have such technology. So, if you have a 1995 Toyota Corolla, you need the transmitter to connect your phone to the car. 

But with so many transmitters to choose from, which one do you pick? Our guide helps narrow the hunt down for you to the top five from which you can choose the best Bluetooth FM transmitter based on your needs.

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Table of Contents

  1. VicTsing 2021 V5.0 Bluetooth FM Transmitter
  2. Sumind Bluetooth FM Transmitter
  3. VicTsing Bluetooth FM Transmitter
  4. Nulaxy Bluetooth FM Transmitter (KM29)
  5. Nulaxy Wireless in-Car Bluetooth FM Transmitter (KM18)
  6. Frequently Asked Questions About Bluetooth FM Transmitters
  7. Our Picks
  8. Our Final Thought

Picking the Best Bluetooth FM Transmitter: Our Top Five Picks

1. VicTsing 2021 V5.0 Bluetooth FM Transmitter

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The VicTsing 2021 is an ergonomically designed, easy-to-use FM transmitter that enables you to listen to your favorite tunes while you drive. 

When we first got our hands on the transmitter, we were very excited. It claims to enhance the bass to the point it feels like you have a subwoofer in the car, even if you don’t. Unfortunately, we didn’t feel the deep-bass immersion that the product promises. 

But, it does deliver on high-quality audio. There is depth and clarity as if you were listening directly from your device. 

The product is plug-and-play. All you have to do is connect your phone to the device and make sure the radio is tuned to the FM channel displayed on the transmitter. You can even make and control calls directly from it. The call joystick knob lets you make and end calls. 

One feature we did love was the fast charge capabilities of the product. It can supply up to 23W, so you can quickly charge your smart devices while on the road. 

Overall, the VicTsing 2021 is a smart choice for anyone looking for an FM transmitter. Besides providing you with Hi-Fi audio, it functions exceptionally well as a charger and has useful features. It also features the most compact design out of all the devices on our list. 


  • Ergonomic design with a joystick knob makes it easier to make and end calls
  • Compact design, the device won’t bother you in any way while you drive
  • Three USB charging ports with fast-charging capabilities
  • Delivers Hi-Fi audio with depth and clarity


  • Doesn’t deliver on the deep-bass immersion it promises
  • You have to be a little careful when using the knob, the build is flimsy
  • Small display screen which only displays the required FM frequency

2. Sumind Bluetooth FM Transmitter

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The Sumind Bluetooth FM Transmitter seems bulky at first but has a user-friendly design. The gooseneck connected to the main body lets you position the transmitter to your liking. The body features a 1.7 inch bright LCD screen that displays various information from the mode to the current song playing. 

Pairing and plugging in the transmitter is easy but positioning the transmitter so the driver can see the LCD can be tricky. While the LCD is bright, it has limited viewing angles, forcing you to rotate it so the LCD is straight on in your view. Otherwise, it is dull and unreadable. 

The product features noise and interference reduction technology which produces high-quality audio. The audio is streamed over 4.2 Bluetooth, so you get clear, static-free audio. 

There are two ways to connect your device to the transmitter. You can either connect it through Bluetooth or the aux port. 

However, we found the sound quality produced when connected through the aux jack was low. You could notice a clear quality difference when compared to the Bluetooth. We don’t think many users will connect through the aux. 

For those looking for a car charger, the transmitter delivers. You get 2 USB charging ports, a 2.4 A charge port, and a QC 3.0 fast-charge port. 

Overall, the Sumind Bluetooth FM Transmitter delivers everything it advertises. You get a reliable FM transmitter that produces top-quality audio for calls and music, all at a reasonable price. 


  • Easy controls with big, easy-to-tap buttons
  • QC 3.0 charge port delivers fast charging
  • Gooseneck enables you to position the transmitter for easy viewing


  • 1.7-inch screen is difficult to view unless directly pointed at you
  • Aux produces low-quality audio
  • Bulky design might interfere with driving

3. VicTsing Bluetooth FM Transmitter

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The second VicTsing FM transmitter on our list. This option comes with a 1.8-inch color screen that displays call and music information. 

The product allows you to forgo listening to the radio and connect your phone to your car’s audio system to listen to your favorite songs. It features auto-frequency tuning, which finds an unused FM station to connect with, giving you a static-free audio experience. 

Like the Sumind Bluetooth FM Transmitter, you can connect your phone to the transmitter through Bluetooth or aux cable. We preferred Bluetooth over aux, due to more clarity and depth in the audio. The transmitter also has an SD slot, so you can play music from a compatible memory card. 

No matter which way you opt to connect, the process is seamless. You should be connected in seconds after plugging in the transmitter. 

The LCD on this device is more colorful and brighter than the Sumind Bluetooth FM Transmitter. You won’t struggle as much reading information on sunny days. It also comes with a flexible metal hose stand so you can position the transmitter ideally for your view.

To ensure you get the most out of your music or audio, the transmitter comes equipped with 5 EQ modes. You can choose a mode based on the type of audio you are listening to, which allows you to get the most depth and clarity. All 5 EQ modes work exceptionally well. 

With 2 USB charging ports, you and other passengers can easily charge smart devices on the road. 

Overall, the VicTsing Bluetooth FM Transmitter provides crystal-clear sound when connected through Bluetooth and gives drivers hands-free calling abilities. What more can you ask for from a Bluetooth FM transmitter? 


  • Auto tuning functionality helps you easily pair to an unused radio station
  • 1.8-inch colorful screen makes it easy to read the information
  • Exceptional microphone for voice navigation and calls


  • Unstable metal gooseneck neck does not maintain position while driving
  • Aux audio quality not as good as Bluetooth

4. Nulaxy Bluetooth FM Transmitter (KM29)

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The Nulaxy Bluetooth FM Transmitter (KM29) gives car owners with no smart device connectivity to the sound system an easy way to pair their mobile device. The build and design of the transmitter are the best you will find on the market. You can be certain that it will let you rock out in your car for years to come. 

The first thing you will notice about the transmitter is the bright, colorful 1.8-inch TFT display. It is bright enough for you to view even on the sunniest days. The body has buttons big enough for you to press to skip a song or change modes. 

Like the VicTsing Bluetooth FM Transmitter, this too comes with 5 EQ modes. You can pick your mode according to the song you are listening to, so you can make the most out of it. The audio quality produced is exceptional with little to no static in the transmission. 

You get numerous safety features with the transmitter such as short-circuit and over-current protection. These make sure the transmitter and your car’s battery play nice together.

There are multiple ways to connect to the transmitter, you have Bluetooth, aux, and SD card options. For music, an SD card and Bluetooth are your best bet. For calls, your only option is Bluetooth. 

For charging, you have 2 USB ports. They both provide QC3.0 charging which means fast-charging devices will charge at 4x speed. 

Overall, the Nulaxy Bluetooth FM Transmitter (KM29) gives you hands-free capabilities and lets you listen to your favorite tunes on the road. One can argue that it is the best Bluetooth FM transmitter on the market and they wouldn’t be wrong.


  • Sturdy design doesn’t feel cheap or flimsy 
  • Protection features against over-current and short-circuit
  • 1.8 TFT display screen is bright and easy to view


  • Bulky design may get in the way when you shift gears
  • Sturdy body means the gooseneck stand moves around too much while driving

5. Nulaxy Wireless in-Car Bluetooth FM Transmitter (KM18)

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Our second Nulaxy on the list and a slightly compact version of the Nulaxy Bluetooth FM Transmitter. It does everything the KM29 does, in essence, without some of the pizzaz. 

One thing the KM18 doesn’t compromise on is the audio quality. You find many lower-priced FM transmitters have a low signal-to-noise ratio, which leads to more static in the audio. This transmitter fairs well in that regard with a high signal clarity rating. 

By reducing the static in the radio signal, you get clarity in the audio. You can jam along to your favorite songs without missing a beat. It also helps when you are on call, you won’t have to ask the person to repeat themselves because you couldn’t hear them over the static. 

The transmitter comes equipped with a 1.8 inch LCD screen which performs well unless it is sunny out. The LCD lacks depth in color and brightness, making it difficult to read when in direct sunlight. 

We liked the design and buttons on the product. The compact shape makes it easy to adjust in any car without a problem. The buttons are big enough that you can change channels or increase volume easily. 

The transmitter comes equipped with a voltmeter that displays the voltage of your car’s battery. This helps because you can identify when your battery is on the verge of dying. 

There is a reason why the Nulaxy KM18 is one of the more popular FM transmitters on the market. It is easy to use, reasonably priced, and delivers quality sound. We recommend the product to anyone looking for a reliable transmitter. 


  • Low-priced FM transmitter option that delivers exceptional audio
  • Listen to music from SD card or Bluetooth-enabled devices
  • Features a voltmeter that indicates the voltage of the car’s battery


  • Difficult to read dim display screen on sunny days
  • Single USB charging port

Frequently Asked Questions About Bluetooth FM Transmitters

For anyone buying a transmitter, it is important you understand the basics. Here we have some frequently asked questions related to Bluetooth FM transmitters which should help you develop a better understanding of how these products work and how they can make your driving time more enjoyable and productive.

How does an FM transmitter work?

First, you connect your mobile device to the FM transmitter through Bluetooth or an aux port. Next, the FM transmitter sends radio signals to your car stereo system via the specified frequency displayed on the device. This signal then carries music or audio from your mobile device, through the transmitter, into your radio, and finally out your car speaker system. Amazing!

In other words, it’s a way to pair a Bluetooth device with a car if your car doesn’t have a Bluetooth capability built-in.

Which devices can I connect to the FM transmitter?

Any device that has an audio source and the means to connect to the transmitter either through Bluetooth or an aux cable. Note that not every transmitter comes with an aux feature. Devices with Bluetooth technology are your best bet. 

You can find many transmitters that also come with an SD memory slot. For such devices, you can listen to audio directly from an SD memory card by plugging it into the slot. 

What frequency setting is optimal for the best sound quality?

When using an FM transmitter, the device asks you to select the frequency for the audio transmission from the connected device. There are plenty of available frequencies on the radio but some may be more affected by interference than others. The interference is usually from a neighboring station.

To avoid such interference, you should look for a frequency that is both above and below 0.2 Mhz of a neighboring station. This leaves enough frequency space to ensure there is no interference from another station. 

Besides frequency setting, you also need to consider the smart device to transmitter connection you use. Bluetooth is ideal because it limits interference and the products we discussed are specifically made for Bluetooth connectivity. 

The MicroSD card is second to Bluetooth. Aux is last because there are more chances of interference which results in low-quality sound. 

Will the transmitter play mono or stereo audio?

This solely depends on the sound system of your car. The transmitter just transmits the audio from the device to the car’s system. Most cars come with stereo sound systems so will play stereo audio. 

Besides picking an optimal radio frequency, your stereo system plays a vital role in the sound quality of the audio transmitted. Make sure you have functional speakers that are in good condition and a working radio. 

Is an FM transmitter bad for the car?

No, the transmitter should not impact any aspect of the car whatsoever. However, you do need to be careful not to leave the transmitter plugged in when not in use. Some cars lack an auto shut-off feature, which cuts off battery power when the car is turned off. In such cars, leaving the transmitter plugged in could result in a drained battery.

You won’t know that the battery drained until you try to start the car again. This is why it is recommended you unplug the transmitter when it is no longer in use. 

Will the product work on older car models?

As far as the vehicle goes, all that is required is a radio and a cigarette lighter. The transmitter is plugged into the cigarette lighter, which serves as its power supply. The radio receives the audio transmitted from your smart device. 

The reason for inventing the device was so car owners can play their favorite music from smart devices in older model vehicles that don’t come equipped with an entertainment system with Bluetooth or aux functionality. 

Do Bluetooth Transmitters work with all smart devices?

As far as pairing goes, Bluetooth transmitters can be paired with any smart device including Apple, Samsung, or any other company. All that is required is for the device to have Bluetooth capabilities to ensure it can connect to the transmitter. 

What do I need to consider when planning to purchase the best Bluetooth FM transmitter?

While each individual has their preferences, you need to consider the following when selecting the optimal choice for yourself:

  • Budget: Consider the amount you are willing to spend on the device. 
  • Sound quality: The sound should be crystal-clear, without any interference. Otherwise, static can ruin your whole listening experience. 
  • Ease of use: The transmitter should easily connect to your smart device and plug into your vehicle. There shouldn’t be any complicated process to set it up and operate it. 
  • Extra features: You should consider some extra features that will enhance your experience and protect your car’s battery. Features like hands-free calling, short-circuit protection, a built-in voltmeter, and so on. 

Our Picks

  • Budget-friendly option: The VicTsing 2021 is our budget-friendly pick. Under $20, the device provides you with quality transmission and clear sound. 
  • Best overall quality: The Nulaxy KM 29 is the best transmitter overall. Besides crystal-clear sound, you get tons of safety features such as short-circuit and over-current protection. It also features the most colorful and bright display screen. 
  • Best features: This also goes to The Nulaxy KM 29 but if you are on a budget then you can opt for Nulaxy KM18, which lacks a few safety features like smart temperature control and over-voltage protection. Both devices have a built-in voltmeter that lets you keep track of the car’s battery voltage. 

Our Final Thought

Any of the five Bluetooth FM transmitters we have highlighted will fit your needs. All deliver exceptional sound quality and are easy to use. They do vary slightly in price but aren’t too expensive. 

We understand that picking the best Bluetooth FM transmitter is important but it isn’t easy to select one from hundreds of options. Our guide serves to point you in the direction of the five best options out there. All you have to do is pick one according to your budget and the features you want. 

We highly recommend opting for a device that offers safety and protection features. While these features usually result in a higher-priced product, we feel paying the additional amount is worth it because these features protect your car from any mishap. 

That ends our guide. We should warn you to be ready for longer drives because there is no better feeling than listening to your favorite music while driving. Just so you know, if you find yourself driving around endlessly, lost in the music — we warned you first!

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