Retekess TR509 FM Transmitter: The Perfect Solution for Wireless Audio Transmission

Retekess TR509 FM Transmitter: The Perfect Solution for Wireless Audio Transmission

Why choose the FM Transmitter from Retekess?

Retekess FM Transmitter is a great solution for sending wireless audio to any FM receiver device including car radios.


  • Use for live events, drive-in concepts, parking lot service, translation, for the hearing impaired, and more
  • Broadcast your audio up to 1km/3280ft in all directions; unlimited users
  • Easy to install; Connect the FM Transmitter into the audio output of your audio device and select an available FM station
  • For drive-in applications, have your customers park in the parking lot and remain in their vehicles
  • Your customers only need to tune to the FM station you selected


  • Working voltage: 11~13V DC (Rated voltage 12V)
  • Working current: 1.67A
  • The operating temperature of the environment: -10°C~50°C
  • Output impedance: 50Ω
  • Harmonic and noise radiation: ≤-60dB
  • Audio distortion: <0.30%
  • Preemphasis delay: 75us
  • Degree of separation: ≤75 dB
  • Input level: ≤75 dBV
  • SNR (Signal to Noise Ratio): ≤80 dB
  • Item Dimensions: 128 (L) x 95 (W) x 55 (H) mm
  • Weight: body 479g/1.05lb (include antenna)

Package Details:

  • 1 x TR509 Transmitter
  • 1 x TNC Antenna
  • 1 x 3.5mm Audio Cable
  • 1 x Power Adapter
  • 1 x English User Manual

About this item

FCC certified. FCC ID: 2ASVO05B7CT200; Broadcast audio over your own FM station to car radios, walkmen or any device that can receive FM stations; your customers only need to tune to the FM station you selected.

Adjustable distance; max 1km/3280ft long range; transmitter can also be connected external mic equipment and used in wide place such as campus shopping mall radio; conference speech etc.

Line level stereo input; professional PLL modulation system; make transmitter work stable; can adjust the volume on your audio device and mic in the transmitter until you are satisfied with the sound quality.

High visibility LCD interface for maximum ease-of-use; parameters used by mini FM transmitter can be automatically saved after shutdown; It can be read automatically the next time it is turned on.

The stability of the chassis using high-quality aluminum alloy material; excellent heat dissipation; no noticeable sound delay when listening to audio from our FM transmitter.


The Retekess TR509 FM Transmitter is the perfect solution for wireless audio transmission. With its long-range capabilities and easy installation, it is suitable for various applications such as live events, drive-in concepts, and parking lot services. The transmitter’s high-quality construction ensures stability and excellent heat dissipation. Whether you need to broadcast audio to car radios or other FM receiver devices, the Retekess FM Transmitter is a reliable choice.