FM transmitter KENNER FT624 — Bluetooth, USB, hands-free car adapter

KENNER FT624 is an FM transmitter and car adapter that enables wireless audio streaming and hands-free calling through a vehicle's FM radio. The unit provides Bluetooth connectivity and a USB interface to play music from smartphones or other Bluetooth devices, while also offering fast charging via two USB outputs. Designed to work with stereos that lack native Bluetooth, the FT624 converts Bluetooth audio and voice into an FM frequency to be received by the car radio. The built-in microphone with noise reduction ensures clear voice transmission during calls, and the device includes bass enhancement and RGB LED lighting for basic visual feedback.

Advantages

FT624 combines audio streaming, hands-free calling and fast charging in a single compact adapter that plugs into the vehicle power socket. The microphone incorporates noise reduction to improve call clarity, while the Bass Booster enhances low-frequency response for fuller-sounding playback. Dual charging sockets support PD20W and QC18W fast-charge protocols to power phones and accessories. Google voice assistant support allows voice commands when connected, and automatic switching to hands-free mode activates the call function as soon as a call is received.

Suitable for

• Vehicles without built-in Bluetooth where FM transmission is needed
• Drivers who want hands-free calling and voice assistant access
• Users needing simultaneous audio streaming and device fast charging
• Cars where simple plug-and-play installation via the 12V socket is preferred

Key specifications

• Connectivity: Bluetooth audio streaming and hands-free calling
• Audio transmission: FM transmitter compatible with car FM radio
• Microphone: built-in with noise reduction for clearer voice pickup
• Charging outputs: two USB ports supporting PD 20W and QC 18W fast charging
• Enhancements: Bass Booster for improved low-frequency response
• Controls and feedback: RGB LED lighting and call/track control via the adapter
• Voice assistant: supports Google voice assistant commands when connected
• Power interface: plugs into vehicle 12V power/socket for installation

How to use

Plug the FT624 into the vehicle's 12V socket and power it on. Pair your smartphone or Bluetooth device with the transmitter following the Bluetooth pairing procedure shown by the car radio or device. Tune the car FM radio to the same unused FM frequency selected on the transmitter to receive audio playback. Use the transmitter controls to manage playback and answer or end calls; incoming calls will automatically switch the device into hands-free mode. Connect devices to the USB ports for fast charging while streaming audio or during calls.

Usage recommendations

For stable audio quality, select an FM frequency without local radio stations to minimize interference. Position the transmitter so the microphone is not obstructed and avoid covering it to maintain clear voice pickup. Use a suitable USB cable rated for fast charging to benefit from PD20W or QC18W outputs. When using Google voice assistant, ensure the phone's assistant settings and Bluetooth permissions are enabled.