Introduction
The Syncwire Bluetooth 5.4 FM Transmitter is a versatile car accessory designed to enhance your in-car audio experience and charging capabilities. It features advanced Bluetooth 5.4 technology for stable connections, dual fast-charging ports (PD 30W & QC 3.0) for efficient power delivery, Hi-Fi deep bass sound, and CVC noise suppression for clear hands-free calls. Its wide compatibility makes it suitable for various devices and vehicles.
Safety Information
Always use this device according to the operation guide and user manual provided. Ensure proper installation and operation to prevent damage or injury.
Product Features
- 48W Max Fast Charging: Supports simultaneous charging of two devices with Type-C PD 30W and QC 3.0 ports, reaching a maximum total power of 48W for efficient charging.
- Advanced Bluetooth 5.4 FM Transmitter: Built-in latest Bluetooth 5.4 technology provides stable connection for streaming music and hands-free calls, faster pairing, smart voice navigation, and audio streaming from navigation apps/Siri/Google Assistant.
- Hi-Fi Deep Bass & Colorful Backlit: Features an exclusive bass key-press for enhanced stereo effect and crystal-clear sound. The surrounding colorful LED backlight pulses with rhythm and can be turned off by long-pressing the "b" button.
- CVC Noise Suppression Hands-free Calls: Built-in Noise Suppression (CVC) reduces external environmental noise for clear hands-free calls. A single button allows answering/rejecting/hanging up/recalling calls, seamlessly switching between calls and music.
- Wide Compatibility: Compatible with any Bluetooth device such as iPhone, iPad, iPod, Samsung Galaxy, Sony, MP3 players, tablets, and more Android smartphones. Fits 12V-24V cars and trucks.
Setup Guide
Follow these steps to set up your Syncwire Bluetooth FM Transmitter:
- Prepare your Car Radio: Set your car radio to FM Mode (not AM mode). Choose a blank, unused FM frequency with no static.

Image showing a car radio display with FM mode selected and a blank frequency (e.g., 103.00 MHz) chosen.
- Plug in the Transmitter: Insert the FM Transmitter into your car's cigarette lighter socket.

Image of the Syncwire FM Transmitter, showing its design with dual USB ports and LED ring, inserted into a car's power outlet.
- Adjust Transmitter Frequency: Press the "CH" button on the transmitter. The LED display will show "bt" and then the current FM frequency. Rotate the knob to adjust the transmitter's frequency to be the same as the blank frequency you selected on your car radio.

Image illustrating a hand rotating the knob on the FM transmitter to change its frequency, matching it to the car radio's display.
- Pair via Bluetooth: Activate the Bluetooth function on your smartphone. Search for "SW-XC726" in the list of available devices and select it to pair.

Image showing a smartphone's Bluetooth settings screen with "SW-XC726" listed as a discoverable device, ready for pairing.
Operating Instructions
Learn how to use the various functions of your FM Transmitter:
Music Playback
Once paired, your phone's audio will be transmitted through your car's speakers.
- Play/Pause: Short press the multifunction button (phone icon) to play or pause music.
- Volume Adjustment: Rotate the large knob clockwise to increase volume (Volume+) or counter-clockwise to decrease volume (Volume-).
- Deep Bass Mode: Short press the "b" button to activate Hi-Fi Deep Bass mode for enhanced audio.

Image showing the 'b' button on the transmitter, indicating its function to toggle Deep Bass Mode on or off.
Hands-Free Calling
The built-in microphone and CVC noise suppression ensure clear calls.
- Answer Call: Short press the multifunction button (phone icon) when an incoming call rings.
- Reject Call: Long press the multifunction button (phone icon) to reject an incoming call.
- Hang Up/Recall: Short press to hang up, long press to recall the last number.

Image detailing the call handling functions of the transmitter: short press to answer, long press to reject, and other options for hands-free communication.
LED Backlight Control
- Turn ON/OFF Colorful Light: Long press the "b" button to turn the colorful LED backlight ON or OFF.

Image demonstrating how to long-press the 'b' button to toggle the colorful LED light ring on or off.
Charging Devices
The transmitter features two fast-charging USB ports:
- Type-C PD 30W Port: For high-speed charging of compatible devices.
- QC 3.0 Port: For quick charging of compatible devices.

Image highlighting the PD 30W Type-C port and QC 3.0 USB-A port on the transmitter, capable of fast charging two devices simultaneously.
Maintenance
To ensure the longevity and optimal performance of your Syncwire FM Transmitter:
- Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- Avoid exposing the device to extreme temperatures, direct sunlight, or moisture.
- Do not attempt to disassemble or repair the device yourself. Contact customer support for assistance.
- Ensure the cigarette lighter socket is clean and free of obstructions for a stable connection.
Troubleshooting
If you encounter any issues with your Syncwire FM Transmitter, try the following:
- No Sound/Static:
- Ensure the FM frequency on the transmitter matches your car radio's blank frequency exactly.
- Try a different blank FM frequency on your car radio, as some frequencies might have interference.
- Check if your phone's Bluetooth is connected to "SW-XC726" and its volume is turned up.
- Adjust the volume on both the transmitter and your car radio.
- Bluetooth Disconnection:
- Ensure the transmitter is securely plugged into the cigarette lighter.
- Restart your phone's Bluetooth and try pairing again.
- Move your phone closer to the transmitter to ensure a strong signal.
- Charging Issues:
- Verify that the charging cable is securely connected to both the device and the transmitter's USB port.
- Ensure your device supports fast charging for optimal speed.
- Check if the car's power outlet is functioning correctly.
- Poor Call Quality:
- Ensure the microphone on the transmitter is not obstructed.
- Try adjusting the volume during calls.
- Minimize background noise in the car.
Specifications
| Feature | Detail |
|---|---|
| Brand | SYNCWIRE |
| Model Number | SW-XC726 |
| Bluetooth Version | 5.4 |
| Charging Ports | Type-C PD 30W, QC 3.0 |
| Max Total Power Output | 48W |
| Power Source | DC power supply (12V-24V car/truck compatible) |
| Special Features | CVC Noise Suppression Hands-free Calls, Hi-Fi Deep Bass, Colorful Backlit LED |
| Item Weight | 2.46 ounces |
| Package Dimensions | 3.58 x 2.4 x 1.54 inches |
| Material | Rainbow LED (referring to the LED ring) |
| Country of Origin | China |
Compatibility
The Syncwire Bluetooth FM Transmitter is widely compatible with:
- Smartphones: iPhone (e.g., iPhone 14 Pro Max/14 Pro/13 Pro), Samsung Galaxy (e.g., S23/S22/S21/S10), Google Pixel (e.g., 7/7 Pro/6/4), and other Android smartphones.
- Tablets: iPad (e.g., iPad Pro/iPad Mini/iPad Air).
- Other Bluetooth Devices: iPod, MP3 players, etc.
- Vehicles: 12V-24V cars and trucks.

Image showing the transmitter's compatibility with various iPhone, iPad, and Android phone models, as well as 12V and 24V vehicles.
Official Product Videos
Watch these official videos from Syncwire for more information and demonstrations:
- SYNCWIRE FM Transmitter
This video provides an overview of the Syncwire FM Transmitter, showcasing its key features and design.
- SYNCWIRE FM Operation
A demonstration of how to operate the Syncwire FM Transmitter, including setting up the FM frequency and basic controls.
Warranty and Support
For warranty information, technical support, or any inquiries regarding your Syncwire Bluetooth FM Transmitter, please refer to the product packaging or visit the official Syncwire website.
You can also visit the SYNCWIRE Store on Amazon for more products and support.




