When it comes to making a phone call behind the wheel, a Bluetooth kit for your car is essential. In states such as California, it's even illegal to use your cellphone while driving and can result in a fine of $160+.
If you'd like to install Bluetooth in your car, but don’t want to spend the excess money on a Car Stereo, and deal with the hassle of installation you can either:

1. Use your existing car stereo's aux-in port if you have one (headphone input jack on your car's stereo). This is great for both making phone calls and playing music from your mobile phone or device, however can lead to echo issues while making phone calls.
2. If you don’t have an aux-in port and your priority is making Bluetooth phone calls more than playing music via Bluetooth, a clip-on speakerphone is your best choice.
3. If quality music is more important than making phone calls, you can choose an FM transmitter - a Bluetooth connection that uses a set FM station to transmit your audio (music or phone calls). These are more geared towards listening to music.

This review is focused on finding the best universal Bluetooth units that allow you to make phone calls safely from your car so that you can keep your eyes on the road at all times, preventing accidents and tickets! They're universal, easy to install and work in almost any car with an AUX input (see description for those that require an AUX).