Transmiters

Bluetooth car transmitter — how it works and which to choose

A Bluetooth transmitter is a small device that connects wirelessly to your smartphone and sends audio to the car's audio system. This allows you to listen to music from Spotify, podcasts or make phone calls through the car speakers — even if your car does not have built-in Bluetooth.

Types of transmitters

• FM Bluetooth transmitter — broadcasts a signal on a selected FM frequency. You receive it on the car radio. Requires no cables — just plug it into the cigarette lighter socket
• Bluetooth AUX transmitter — connected via a 3.5 mm jack cable to the AUX input on the radio. Better sound quality than FM because the signal is not compressed
• Bluetooth USB transmitter — plugged into the USB port on the car radio. Some models also support music playback from a flash drive

What to consider when choosing a transmitter

• Connection type with the radio — FM, AUX or USB? Check what inputs your car radio has
• Bluetooth version — newer versions (5.0, 5.3) ensure a more stable connection and lower power consumption
• Phone charging — many transmitters have a built-in USB or USB-C port for charging your smartphone while driving
• Hands-free kit — a built-in microphone lets you answer calls without taking your hands off the steering wheel
• Audio codecs — aptX and AAC provide better sound quality than the standard SBC

Transmitters and other car accessories

A transmitter is one of the accessories that make using your phone in the car easier. It is also worth considering a USB cable for connecting your smartphone, or a car charger that adds fast charging to the transmitter. Also check power banks for longer trips.

FAQ

Does an FM transmitter degrade sound quality?

An FM transmitter compresses the audio signal, so quality is lower than with an AUX or USB connection. The difference is noticeable when listening to music, but for podcasts and phone calls, FM is perfectly adequate. If sound quality matters to you, choose a transmitter with an AUX output.

How to connect a Bluetooth transmitter to a car?

An FM transmitter just needs to be inserted into the cigarette lighter socket, set a frequency on the device and match it on the radio. An AUX transmitter connects via a 3.5 mm jack cable to the AUX input. In both cases, pairing with the smartphone is done via Bluetooth — turn on the transmitter and look for it in the device list on your phone.