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A compact black plastic FM transmitter with dual USB ports and a 12V plug

Audiovox BTFM9 Car HD Radio, dual USB 12W charging, hands-free calls

SKU CH-Q0Q4-XXN4F MPN BTFM9

An FM transmitter that streams audio via Bluetooth, charges two devices from dual USB ports, and handles hands-free calls

  • Tuning rangeBluetooth
  • FM selectivityBluetooth
  • FM stereo separationStereo
  • AM selectivityThis product may experience interference with other wireless
  • Power sourceCorded Electric
  • Compatible withSmartphone
  • Dual USB ports deliver 12W fast charging
  • Hands-free calls keep eyes on the road
  • Voice control works with Siri and Google Assistant
  • Compact adapter fits 12V cigarette lighter socket
  • Lightweight design weighs only 0.11 kilograms

Dual 12W USB charging for phones

The Audiovox BTFM9 plugs into a 12 V cigarette-lighter socket and provides one USB-C and one USB-A port, each rated at 12 W, so two devices can charge at the same time while the transmitter streams audio to the car’s FM radio. A built-in microphone and dedicated call buttons let the driver answer or end calls without touching the phone.

Replaces a basic FM transmitter with no charging

Older single-port adapters often leave a phone unpowered on long trips, forcing a choice between navigation audio and battery life. The jump is worth it when you regularly drive with both a phone and a second device such as a passenger’s handset or a tablet that needs a USB-C connection.

Suits drivers who need hands-free calls

Commuters who rely on voice assistants for messages or directions will benefit from the Siri and Google Assistant integration. Buyers whose vehicle already has factory Bluetooth or who only need a single USB-A port should look at simpler, lower-cost transmitters instead.

How it compares

Measured against everything we stock in HD Radio Tuners & FM Transmitters, at today’s prices. Recalculated every night.

Price $30.99
Pricier than about 56% of the 127 comparable items (median $27.99).

Specifications

Product
Brand nameAudiovox
Model nameBTFM9
Power
Power sourceCorded Electric
Size & build
Product dimensions14.33 in W × 12.83 in H × 9.06 in D
Product weight0.11 kg
Compatibility
Compatible withSmartphone
More details
Tuning rangeBluetooth
FM selectivityBluetooth
FM stereo separationStereo
AM selectivityThis product may experience interference with other wireless devices., Stereo

Questions about this item

Does the transmitter plug into a 12 V cigarette lighter socket for power?

Yes, the unit draws power from a standard 12 V cigarette lighter socket and provides dual USB-A and USB-C ports rated at 12 W total for charging phones or other devices.

How do I pair my phone and select an FM frequency on the BTFM9?

Insert the transmitter into the 12 V socket, tune the car radio to an unused FM frequency, then press the multifunction button to enter pairing mode and select the device from your phone’s Bluetooth menu.

Can the 3.5 mm aux port be used if Bluetooth drops out?

The 3.5 mm aux connection lets you feed audio directly from a phone or MP3 player to the transmitter, so playback continues even when wireless link is unavailable.

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