Introduzione
This instruction manual provides detailed information on the operation, features, and maintenance of your SONRU FM Transmitter Bluetooth Car Adapter. Please read this manual thoroughly before using the product to ensure proper function and safety.

Image: The SONRU FM Transmitter Bluetooth Car Adapter, a compact device designed to plug into a car's cigarette lighter socket, featuring a digital display, two USB charging ports (PD and QC3.0), and control buttons for music and calls.
Informazioni sulla sicurezza
- Riscaldamento: Protect against over-heating during fast charging.
- Interferenza wireless: May experience interference with other wireless devices.
- Riservatezza: Product includes a built-in microphone; be aware of privacy concerns.
Caratteristiche del prodotto
- Tecnologia Bluetooth 5.3 aggiornata: The adapter utilizes an advanced Bluetooth 5.3 chip for faster, more stable, and smarter connections. It optimizes transmission delay and connection stability, providing high-fidelity music.

Image: A close-up showing the "Bluetooth 5.3" logo and a microchip, illustrating the advanced Bluetooth technology for fast connection, stable transmission, lower latency, and noise suppression.
- Doppia porta di ricarica rapida: Equipped with PD 30W and QC3.0 18W fast charging ports, allowing simultaneous high-speed charging of two devices. This design is 80% more efficient than standard chargers, enabling devices to charge from 0% to 80% in approximately 30 minutes.

Image: The FM transmitter with two USB ports labeled "PD 30W" and "QC 3.0 18W", indicating its dual fast charging capabilities. The image also shows a comparison bar graph highlighting 80% efficiency.
- Hands-Free Calling & Crystal Clear Sound: Features CVC8.0 noise cancellation and echo cancellation to reduce external environmental noise, ensuring clear hands-free calls. A dedicated call button facilitates easy hands-free calling for safer driving.

Image: A person driving and interacting with a voice assistant, with an overlay showing the FM transmitter and a phone displaying call options (answer, hang up, reject, redial). This illustrates the hands-free calling feature.
- Multifunctional FM Transmitter: Supports both Bluetooth and TF card playback (up to 32GB). It provides clear voice commands for safe driving, allowing activation of Siri or Google Assistant for phone calls. The device also features 7 colorful ambient lights.

Image: The FM transmitter shown in a car's console, highlighting two music playing modes: TF Card (with a 4GB card inserted) and Bluetooth (with a phone displaying a music player app). This demonstrates its versatility.

Image: The FM transmitter displaying various colorful light options (green, pink, blue, purple, cyan, yellow, white), indicating its customizable ambient lighting feature.
- Enhanced Safety & Guarantee: Provides multiple protections including over-heat, over-current, over-voltage, and short-circuit protection during device charging.
Istruzioni di installazione
- Insert into Cigarette Lighter Socket: Plug the FM transmitter into your car's 12V cigarette lighter socket. The device will power on and display the current FM frequency.
Video: A demonstration of plugging the SONRU FM Transmitter into a car's cigarette lighter socket and then tuning the car radio to an unused FM frequency. It then shows pairing a smartphone via Bluetooth to the device and playing music through the car's speakers.
- Sintonizzazione della frequenza FM: Find an empty FM frequency on your car radio (one with no static or active broadcast). Then, adjust the FM transmitter's frequency to match your car radio's frequency. This is typically done by long-pressing the "Next/FM+" or "Prev./FM-" buttons on the transmitter until the frequency display flashes, then short-pressing to adjust.
- Accoppia Bluetooth: On your smartphone, enable Bluetooth and search for available devices. Select "BC41" from the list to pair. Once connected, you can play audio from your phone through your car's speakers.
Istruzioni per l'uso
Funzioni dei pulsanti terminateview

Image: A detailed diagram of the FM transmitter's buttons and ports, labeled with numbers and descriptions for easy identification and understanding of their functions.
- Microfono: Per chiamate in vivavoce.
- Luce LED: Indicates device status and provides ambient lighting.
- Colorful Light Button: Short press to switch light color; long press to activate LED breathing mode.
- Slot per schede TF: Insert a TF card (up to 32GB) for music playback.
- Cigarette Point and Shrapnel: For power connection in the car's socket.
- Finestra LED: Displays FM frequency and voltage.
- Porta di ricarica rapida PD 30W: Ricarica ad alta velocità per dispositivi compatibili.
- QC3.0 18W Fast Charging Port: High-speed charging for compatible devices. Note: Only the right USB port (QC3.0) can serve as a USB reader for music playback from a U disk.
- Next/FM+ Button: Short press for next song/next FM frequency; long press to enter FM mode.
- Play/Pause/Answer/Redial Button: Short press to play/pause music, answer/hang up calls; long press to redial the last number.
- Prev./FM- Button: Short press for previous song/previous FM frequency; long press to wake up Siri/Google Assistant.
Riproduzione musicale
- Modalità Bluetooth: Once paired, open your music app on your phone and start playback. Use the transmitter's buttons to control tracks (Next/Prev) and play/pause.
- Modalità scheda TF: Insert a TF card with MP3/WMA/WAV/FLAC audio files into the TF card slot. The device will automatically detect and play music. Use the transmitter's buttons for control.
- Modalità disco U: Insert a U disk with audio files into the QC3.0 USB port. The device will automatically detect and play music. Use the transmitter's buttons for control.
Chiamata a mani libere
- Rispondi/Termina chiamata: Short press the phone button to answer an incoming call or end an ongoing call.
- Rifiuta chiamata: Long press the phone button to reject an incoming call.
- Ricomposizione: Premere due volte il pulsante del telefono per ricomporre l'ultimo numero chiamato.
Assistente vocale
- Attiva Siri/Assistente Google: Long press the "Prev./FM-" button to activate your smartphone's voice assistant (Siri or Google Assistant).
Illuminazione ambientale
- Cambiare colore: Short press the colorful light button to cycle through the 7 available colors.
- Modalità di respirazione: Long press the colorful light button to activate the LED breathing mode, where colors fade in and out.
Manutenzione
To ensure the longevity and optimal performance of your SONRU FM Transmitter, please follow these maintenance guidelines:
- Mantenere il dispositivo asciutto. L'umidità può danneggiare i circuiti interni.
- Avoid extreme temperatures. High temperatures can shorten the life of electronic devices.
- Non far cadere, urtare o scuotere il dispositivo. Una manipolazione brusca può rompere i circuiti interni.
- Pulisci il dispositivo con un panno morbido e asciutto. Non utilizzare prodotti chimici o detergenti aggressivi.
- Per un collegamento sicuro, assicurarsi che la presa dell'accendisigari sia pulita e priva di detriti.
Risoluzione dei problemi
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Nessuna alimentazione/display spento | Loose connection; car socket issue; device fault. | Ensure the device is firmly plugged in. Check if the car's cigarette lighter socket is working. Try in another vehicle if possible. |
| Qualità audio statica o scarsa | FM frequency interference; volume too low/high; poor Bluetooth connection. | Change to a different, unused FM frequency on both the transmitter and car radio. Adjust volume on both the phone and car radio. Re-pair Bluetooth. |
| Impossibile accoppiare Bluetooth | Bluetooth non abilitato; dispositivo non in modalità di associazione; interferenza. | Ensure Bluetooth is enabled on your phone. Restart both the transmitter and phone. Make sure no other devices are connected to the transmitter. |
| La ricarica è lenta o non funziona | Cable issue; device not compatible with fast charging; power output insufficient. | Use a high-quality charging cable. Ensure your device supports PD or QC3.0 fast charging. Check the power output requirements of your device. |
Specifiche
- Dimensioni del prodotto: 1.7 x 1.3 x 2.7 pollici (1.7"L x 1.3"W x 2.7"H)
- Peso dell'articolo: 1.1 once
- Numero modello: BC41
- Tecnologia di connettività: Bluetooth 5.3
- Fonte di energia: Elettrico con cavo (accendisigari per auto)
- Porte di ricarica: PD 30W, QC3.0 18W
- Caratteristiche speciali: Built-In Microphone, Fast Charging, Hands-Free Calls, Low Latency, Noise Cancellation, 7 Colorful LED Lights, TF Card/U Disk Playback
- Gamma di frequenza FM: 87.5 - 108.0 MHz
Garanzia e supporto
SONRU provides a 2-year warranty for this product. If you encounter any problems during use within this period, please contact us. We are committed to providing a satisfactory solution.
For further assistance, please visit the official SONRU store or contact customer support through your purchase platform.



