Introduction
This manual provides detailed instructions for the SONRU Bluetooth 5.3 FM Transmitter Car Adapter. This device allows you to stream audio from your Bluetooth-enabled devices to your car's FM radio, make hands-free calls, and fast-charge multiple devices simultaneously. Please read this manual carefully before use to ensure proper operation and to maximize the product's performance.
Product Features
- Advanced Bluetooth 5.3 Technology: Ensures a faster, more stable, and smarter connection with compatible devices, optimizing transmission delay and connection stability for high-fidelity music.
- 54W Fast Charging: Equipped with dual PD 36W and QC3.0 18W fast charge ports, compatible with various fast charging protocols for Samsung, iPhone, iPad, and more. Each port can output up to 36W when used alone.
- Hi-Fi Deep Bass & 5-Color LED Backlight: Features unique volume, bass, and treble control. Activate deep bass mode with the dedicated "BASS" button for immersive stereo sound. The 5-color LED backlight enhances the in-car ambiance.
- Hands-Free Calling: Built-in Noise Suppression (CVC) and echo-cancellation technology reduce external noise for clear hands-free calls.
- Ultra-Large Capacity USB Port: Supports USB flash drives up to 64GB for playing WMA, MP3, WAV, APE, and FLAC music formats.
- Multiple Safety Protections: Provides protection against over-heat, over-current, over-voltage, and short-circuit, ensuring safe charging while driving.
Package Contents
- SONRU Bluetooth 5.3 FM Transmitter Car Adapter
- User Manual
Product Overview
Image: The SONRU Bluetooth 5.3 FM Transmitter Car Adapter, showing its display, control knob, USB ports, and side buttons.
- LED Display
- U-Disk Port (USB-A)
- QC3.0 18W Fast Charging Port (USB-A)
- PD 36W Fast Charging Port (USB-C)
- Microphone
- Light Button (for LED backlight control)
- Bass Button (for deep bass mode)
- Multi-function Button (for channel, volume, call control)
Setup Instructions
- Insert the Transmitter: Plug the SONRU FM Transmitter into your car's cigarette lighter socket. The LED display will light up.
- Tune Car Radio: Turn on your car's FM radio and find an unused, blank FM frequency (e.g., 108.0 MHz) with no static.
- Match Transmitter Frequency: Press and hold the multi-function button on the transmitter until the FM frequency on its display starts flashing. Rotate the multi-function button to adjust the transmitter's frequency to match the blank frequency you selected on your car radio.
- Pair via Bluetooth: On your mobile device, enable Bluetooth and search for available devices. Select "BC91" from the list to pair. Once connected, the transmitter's display will show a Bluetooth icon.
Image: A visual guide demonstrating the three steps for connecting the FM transmitter: tuning the car radio to a blank frequency, setting the transmitter to the same frequency, and pairing with a phone via Bluetooth.
Operating Instructions
Music Playback
The SONRU FM Transmitter supports two primary methods for music playback:
- Bluetooth Streaming: After successful Bluetooth pairing, open your music application on your mobile device and start playing audio. The sound will be transmitted to your car's speakers via the selected FM frequency.
- U-Disk Playback: Insert a USB flash drive (up to 64GB) containing WMA, MP3, WAV, APE, or FLAC audio files into the designated U-Disk port. The transmitter will automatically detect and play the music files.
Image: The FM transmitter displaying options for music playback via Bluetooth from a smartphone and directly from a USB flash drive (U-Disk).
Hands-Free Calling
When your phone is connected via Bluetooth, you can manage calls directly through the transmitter:
- Answer Call: Press the multi-function button once to answer an incoming call.
- Hang Up Call: Press the multi-function button once during a call to hang up.
- Reject Call: Press and hold the multi-function button to reject an incoming call.
- Redial: Double-press the multi-function button to redial the last number.
Image: A driver using the hands-free calling feature of the SONRU FM Transmitter, with icons indicating answer, hang up, redial, and play/pause functions.
Deep Bass Function
Enhance your audio experience with the deep bass mode:
- Activate Deep Bass: Press the "BASS" button located on the side of the transmitter to instantly switch to deep bass mode.
- Deactivate Deep Bass: Press the "BASS" button again to return to standard audio mode.
Image: The SONRU FM Transmitter with a finger pressing the 'BASS' button, illustrating how to activate the deep bass sound mode.
LED Backlight Control
The transmitter features a 5-color LED backlight:
- Change Colors/Turn On/Off: Press the "Light" button on the side of the transmitter to cycle through the 5 breathing light colors or to turn the lights off.
Image: Two views of the SONRU FM Transmitter, one with the multicolor ambient LED lights turned on and another with the lights turned off, demonstrating the lighting control feature.
Charging Devices
The SONRU FM Transmitter is equipped with powerful charging ports:
- PD 36W Port (USB-C): Provides fast charging for compatible devices such as iPhones, iPads, and other USB-C powered devices.
- QC3.0 18W Port (USB-A): Offers quick charging for devices supporting Quick Charge 3.0, including many Android smartphones.
- U-Disk Port (USB-A): Can also provide standard charging (5V/1A) while simultaneously playing music from a USB drive.
Note: When both PD ports are used simultaneously, the maximum combined output is 36W. When used alone, each PD port can output up to 36W.
Image: The SONRU FM Transmitter plugged into a car's power outlet, with multiple devices (smartphones, tablet) connected and charging, illustrating its 54W super fast charging capability.
Troubleshooting
- Static or Poor Audio Quality: Ensure your car radio and the FM transmitter are tuned to a completely blank FM frequency. Try different frequencies to find one with minimal interference. Strong local radio stations can cause interference.
- Bluetooth Connection Issues: Make sure Bluetooth is enabled on your device and the transmitter is powered on. Forget the device from your phone's Bluetooth settings and try pairing again. Ensure no other Bluetooth devices are interfering.
- Charging Not Working: Check if the transmitter is securely plugged into the cigarette lighter. Ensure your charging cables are functional and properly connected. Verify that your device supports the fast charging protocols (PD/QC3.0).
- U-Disk Not Playing: Ensure the USB flash drive is formatted correctly (FAT32 recommended) and contains supported audio file types (WMA, MP3, WAV, APE, FLAC). Check if the drive is inserted correctly into the U-Disk port.
Specifications
| Feature | Detail |
|---|---|
| Brand | SONRU |
| Model | B0CJM7845Z |
| Connectivity Technology | Bluetooth 5.3 |
| Power Source | Corded Electric (Car Cigarette Lighter) |
| Charging Ports | 1x PD 36W (USB-C), 1x QC3.0 18W (USB-A), 1x U-Disk (USB-A 5V/1A) |
| Supported Media Type | USB Flash Drive (up to 64GB) |
| Supported Audio Formats | WMA, MP3, WAV, APE, FLAC |
| Special Features | Built-In Microphone, Hands-Free Calls, HiFi Deep Bass, Noise Cancellation, 5-Color LED Backlight |
| Compatible Devices | Smartphone, Tablet, Car Stereo System |
| Compatible Vehicle Type | Most Vehicles (12V-24V) |
| Item Weight | 0.06 Kilograms |
Safety Information
Please observe the following safety guidelines:
- Ensure proper usage and handling of the device to prevent damage or malfunction.
- Avoid exposing the device to extreme temperatures, direct sunlight, or moisture.
- Do not attempt to disassemble or modify the device, as this may void the warranty and pose safety risks.
- Be aware of potential interference with other wireless devices.
- Dispose of the product responsibly according to local regulations.
Warranty and Support
This product comes with a 1-year warranty from the date of purchase. For any technical support, warranty claims, or inquiries, please contact SONRU customer service through the retailer's platform or the official SONRU website. Please retain your proof of purchase for warranty purposes.