FM transmitter

FM transmitters play music files recorded on a flash drive or other digital media. They transmit a signal in the FM band to the car radio. They are powered via the lighter socket. They allow upgrading your outdated car audio system.

Operating principle

The modulator is connected to the vehicle’s on-board power network and acts as a link between the radio receiver and a USB flash drive. The device reads digital information and converts it into a distinct radio signal of a specific frequency. The radio transmitter reads this signal and transmits it to the car radio. The data on the FM wave being broadcast is shown on the electronic display.

Types of available FM transmitters

• With an MP3 player. These have a control unit for quick track selection and an LCD screen for displaying information. They have a lot of built-in memory.
• With Bluetooth connectivity. These are connected to a smartphone and, in addition to broadcasting music, make it possible to make calls using speakerphone.

Such devices may also come with remote controls and various connectors and slots for connecting cards. The devices also differ in terms of effective range, internal memory, and the range of radio frequencies.

Recommendations for using FM transmitters

1. To play high-quality music, tune the radio receiver of the car radio and the modulator to the same frequency.
2. To avoid interference, set the active antenna of the car radio away from the device, or turn it off if it’s unneeded.
3. Disconnect the modulator from the onboard power system before starting the engine.
4. Handle the device with care.
5. Do not leave the device on top of the dashboard in the summer.
6. Do not allow moisture to enter the equipment since this may damage it and cause a short circuit in the onboard network.

AUTODOC: easy online shopping

Our online store offers FM transmitters and other products you need for playing music. Our support specialists will provide you with detailed information about any product.