FM transmitters aren't the best option, but for stereo's lacking an AUX port, it's the only option. With this in mind, the Nulaxy KM18 is the best Bluetooth FM transmitter I tested, despite having an audio quality far worse than each of the AUX-in Bluetooth adapters, like the Anker SoundSync Drive.
The TaoTronics TT-BR05 is the simplest Bluetooth car kit I've reviewed. It's plugs into your stereo's AUX port. It has few buttons and no interface. It simply creates a bridge for your phone to stream music through the stereo.
As an AUX-in Bluetooth car kit, the Kinivo BTC450 is a good option with great signal clarity and above average signal strength.
Jabra is one of the biggest and most trusted names in Bluetooth devices, and the Jabra Tour has been around for years. I've reviewed Bluetooth car kits since 2014 and the Tour had already been one of the best Bluetooth car kits for several years.
In past years, the Jabra Freeway was my pick for best Bluetooth car kit because of the superior hands-free call quality.
The Anker SoundSync Drive is a simple, unassuming Bluetooth car kit with exceptional audio performance. This is what makes it the best option for bridging the technology gap between your stereo and your smartphone.
The SoundBot SB360 is very similar to the best Bluetooth car kit overall, the Anker SoundSync Drive, in both price and function. Both are AUX-in Bluetooth adapters of similar size and shape. However, while the audio performance of the SB360 was among the best in my tests, it wasn't elite.
Review Not the most efficient speaker, but it produces good audio and is highly durable for boat use.
Editor’s Note: This product has been removed from our side-by-side comparison because it has been discontinued. You can still read our original review below, but Top Ten Reviews is no longer updating this product’s information. Click here to see our current Top Ten car stereos.