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Three people on a roadtrip


Enjoy your music on the road even if your car doesn’t have an aux port. TuneCast In-Car 3.5mm to FM Transmitter uses FM radio to play your music through your car stereo. Connect the 3.5mm headphone jack to your smartphone and TuneCast transmits your music from your phone to your car’s FM radio. A powered USB-A port charges your phone as you go, to keep the music playing all-journey long.

Made for: Smartphones equipped with a 3.5mm AUX headphone jack, including iPhone 6S/6, Samsung Note 8, S9, LG G6, Google Pixel 2 and previous generations

TuneCast In-Car 3.5mm to FM Transmitter


  • Pioneer in technology and innovation for over 35 years
  • Quickly find the best signal with one touch
  • Activate PRO setting to improve low-level audio
  • Powered USB-A port makes it easy to charge your device
TuneCast In-Car 3.5mm to FM Transmitter Diagram


Simply connect your smartphone to the 3.5mm headphone jack and press the scan button. TuneCast uses cutting-edge ClearScan technology to locate the best available FM signal – all with one touch. Two programmable preset buttons allow you to save previous frequencies for even faster setup, while frequency up/down buttons make searching easy.

Diagram of transmitter in a car's power outlet


A powered USB-A port means you can charge your device while playing your music or audio. Just connect TuneCast to your car’s power outlet and your phone’s charge cable to TuneCast’s universal USB-A port.*

*Charging cable not included

Tunecast PRO button


TuneCast is designed to enable best sound quality from your smartphone. For low-level recordings, activate TuneCast’s PRO setting to optimize audio and boost volume for an improved acoustic experience.

Use the PRO button to access PRO settings

  • Press once for PRO settings
  • Press twice for PRO 1 - boosts audio volume
  • Press three times for PRO 2 - boosts volume further – ideal for older recordings
  • Press four times for PRO Mono Transmission - transmits audio in mono, rather than stereo – recommended for podcasts and audio books
Multiple devices diagram


TuneCast is compatible with most devices with a 3.5mm aux port, including iPhone 6S and previous generations of iPhone, Samsung Note 8 and S9 and older Samsung devices, LG G6, Google Pixel 2 and older LG and Google products.

TuneCast transmitter features callout


1. ClearScan technology locates best signal with one touch

2. 2 programmable preset buttons to find saved stations

3. Frequency up/down buttons for simplified searching

4. Aux cable connects to any device with 3.5mm port

5. Powered USB-A port charges device while in use

At a Glance:

  • Easy-to-use, single-cable solution to listen to music through car stereo
  • Compatible with most devices with 3.5mm aux port
  • Powered USB-A port to charge device while in use
  • Quickly find the best signal with one touch
  • Clear, easy-to-read display
  • PRO setting optimizes audio and boosts volume
  • 2 programmable preset buttons to find saved stations

Package Includes:

  • TuneCast® In-Car 3.5mm to FM Transmitter

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