FM transmitter extra digital BC52LQ — car audio FM transmitter for hands-free playback and wireless streaming

extra digital BC52LQ is a compact in-car FM transmitter that enables wireless streaming of music and hands-free phone calls through a vehicle’s FM radio. The device connects to smartphones and MP3 players via Bluetooth 5.0 or plays audio files from USB flash drives and microSD cards (up to 32 GB). It features dual USB charging (one port with Quick Charge 3.0), an LED display, colorful atmosphere lights, a built-in microphone with echo cancellation and noise reduction, and automatic car battery voltage detection. The transmitter supports common audio formats including MP3, WMA, WAV, FLAC and APE and operates across the FM band for flexible frequency selection.

Advantages

The BC52LQ combines wireless Bluetooth streaming and direct playback from USB or microSD, providing multiple playback sources in one compact unit. Dual USB outputs let you charge two devices simultaneously while using the transmitter, with one port supporting Qualcomm Quick Charge 3.0 for faster charging. Integrated DSP and CVC noise reduction improve hands‑free call clarity, and the LED display with multicolour ambient lighting helps with night use and quick status recognition. Automatic power-off memory and vehicle voltage monitoring add convenience and protect vehicle battery.

Suitable for

• Drivers who want to stream music from a smartphone to a car radio without replacing the stereo
• Users who prefer playing audio from USB flash drives or microSD cards (up to 32 GB)
• People who need hands-free calling with echo cancellation and noise reduction
• Vehicles with 12–24 V electrical systems, such as passenger cars and light commercial vehicles
• Situations where simultaneous device charging is useful—two USB outputs including Quick Charge 3.0

When it may not be suitable

The FM transmitter relies on selecting an unused FM frequency for best audio quality; in areas with crowded FM bands or strong local stations, interference may reduce sound clarity. If your vehicle stereo includes auxiliary, Bluetooth, or USB direct input with better fidelity, those native connections may provide higher-quality audio than FM transmission.

Key specifications

• Bluetooth version: 5.0; Bluetooth transmission distance: up to 10 m
• Supported audio formats: MP3, WMA, WAV, FLAC, APE
• FM frequency range: 87.5–108.0 MHz
• USB output 1: 5 V / 2.4 A (U-disk playback support)
• USB output 2: Qualcomm Quick Charge 3.0, up to 18 W
• MicroSD / U-disk support: up to 32 GB
• Operating voltage: rated 12–24 V; operating range 10–26 V
• Signal-to-noise ratio (SNR): > 60 dB
• Microphone effective range: 0.5–2 m
• Audio processing: DSP and A2DP support; noise cancellation (CVC)

How to use

Plug the FM transmitter into the vehicle’s 12 V/24 V power outlet, choose an unused FM frequency on your car radio and set the same frequency on the transmitter. Pair your smartphone via Bluetooth 5.0 or insert a USB flash drive / microSD card with supported audio files. Use the transmitter controls or your car radio to start playback and adjust volume. For hands-free calls, answer or reject calls using the device controls; the built-in microphone with echo cancellation will handle voice pickup. If charging is needed, connect devices to either USB port; use the Quick Charge 3.0 port for compatible devices to obtain faster charging speeds.

What to consider before purchase

• Check that your car uses a 12 V or 24 V power outlet and that available FM frequencies are not heavily used in your area
• Confirm needed playback sources—Bluetooth, USB flash drive, or microSD—and maximum supported storage (up to 32 GB)
• Consider whether Quick Charge 3.0 compatibility is important for your devices
• Understand that FM transmission quality depends on local radio interference and chosen frequency

Usage recommendations

Select an FM frequency as far as possible from strong local stations to minimise interference and improve music quality. Keep the built-in microphone within 0.5–2 m of the speaker for reliable hands-free call pickup. Use the Quick Charge 3.0 port for fast charging of compatible smartphones and the standard 5 V/2.4 A port for secondary devices.