TUNAI TF002C-SC-1A
TUNAI Firefly LDAC Bluetooth Receiver Instruction Manual
Model: TF002C-SC-1A
Brand: TUNAI

The TUNAI Firefly LDAC Bluetooth Receiver, a compact device designed to upgrade car and home stereo systems with high-resolution wireless audio capabilities.
1. Introduction
The TUNAI Firefly LDAC Bluetooth Receiver is a compact audio accessory designed to bring high-resolution wireless audio streaming to your car or home stereo system. Utilizing advanced LDAC codec technology and a high-quality Cirrus Logic DAC, it ensures an authentic and superior listening experience. This manual provides detailed instructions for setting up, operating, and maintaining your Firefly LDAC receiver.
2. Package Contents
Please verify that all items are present in your package:
- TUNAI Firefly LDAC Bluetooth Receiver
- User Manual (this document)
- 3.5mm AUX Extension Cable (if included with your specific model)
3. Product Features

Simple and Effective Wireless Audio
Transforms your existing home stereo or car audio system into a wireless, Bluetooth-compatible setup with a single, easy-to-use plug. No external charging is required; the Firefly LDAC automatically powers on when your engine starts or your speaker is activated.

Authentic HiFi Audio Quality
Supports high-resolution audio streaming via the LDAC codec at up to 990 kbps, offering superior quality for Android devices. It also supports AAC, the advanced codec for iPhone/iOS devices. Features a Cirrus Logic audiophile-grade 127dB SNR DAC for optimized sound.

Automatic Reconnection & Multi-Device Connectivity
The Firefly LDAC automatically connects to the last paired smartphone upon power-on, similar to built-in car Bluetooth. It can also pair with two devices simultaneously for convenient music sharing.

Integrated Ground Loop Isolator
Equipped with a built-in ground loop isolator to eliminate common hissing and humming noises often found in audio systems, ensuring a clean sound experience. This function can be toggled via the TUNAI Connect App.

TUNAI Connect App Customization
The dedicated TUNAI Connect App allows for customized EQ settings, ground loop control, LED brightness adjustment, and firmware updates, providing a personalized audio experience.
4. Setup Guide
Power Connection
Plug the USB end of the Firefly LDAC into a USB power source (e.g., car USB port, USB charger, or power adapter). The device will automatically power on.

Ensure the USB port provides sufficient power for optimal performance.
Audio Connection
Connect the 3.5mm AUX cable from the Firefly LDAC to your car or home stereo's auxiliary input. If your stereo only has an AUX input and no USB, you will need a USB power adapter (not included) for the Firefly LDAC.

Set your stereo's input source to AUX.
Bluetooth Pairing
On your smartphone or audio device, enable Bluetooth and search for available devices. Select "Firefly LDAC" from the list to pair. The device will indicate successful pairing (e.g., a solid blue LED light).

The device is designed for automatic reconnection to the last paired device when powered on.
Download TUNAI Connect App (Optional but Recommended)
For advanced features and customization, download the "TUNAI Connect" app from your device's app store (Google Play Store for Android, Apple App Store for iOS).

The app allows you to adjust EQ settings, control ground loop noise cancellation, manage LED brightness, and update firmware.
Setup Demonstration Video:
Official TUNAI video demonstrating the setup and features of the Firefly LDAC receiver.
5. Operating Instructions
5.1 Basic Music Playback
- Ensure the Firefly LDAC is powered on and connected to your stereo.
- Confirm your smartphone is paired and connected to the Firefly LDAC via Bluetooth.
- Play music from your preferred app on your smartphone. Audio will be streamed wirelessly to your stereo.
5.2 Multi-Device Pairing (Party Mode)
The Firefly LDAC supports connecting to two Bluetooth devices simultaneously. This allows for seamless music sharing between two users.
- Pair the first device as described in the Setup Guide.
- On the second device, enable Bluetooth and select "Firefly LDAC" to pair.
- Music can now be played from either connected device. The device that starts playing will take priority.

5.3 Using the TUNAI Connect App
The app provides enhanced control over your Firefly LDAC:
- Equalizer Settings: Customize audio output with various EQ presets or create your own custom settings.
- Ground Loop Noise Cancellation: Toggle this feature On/Off to eliminate electrical interference noise.
- LED Brightness: Adjust the brightness of the device's LED indicator.
- Firmware Updates: Keep your device updated with the latest software for optimal performance and new features.

Ensure your phone's Bluetooth is connected to the Firefly LDAC before opening the app.
6. Maintenance
To ensure the longevity and optimal performance of your TUNAI Firefly LDAC, follow these simple maintenance guidelines:
- 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 high humidity.
- Do not attempt to disassemble or modify the device, as this will void the warranty.
- Handle cables and connectors gently to prevent damage.
7. Troubleshooting
If you encounter issues with your Firefly LDAC, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/LED not lighting up. | Insufficient power from USB port or faulty connection. | Try a different USB port or power adapter. Ensure the connection is secure. |
| Cannot pair with device. | Bluetooth not enabled, device not in pairing mode, or too many paired devices. | Ensure Bluetooth is on. Restart the Firefly LDAC by unplugging and re-plugging. Clear old Bluetooth connections on your phone. |
| No audio output. | Incorrect stereo input, loose AUX cable, or low volume. | Check if your stereo is set to the correct AUX input. Ensure AUX cable is securely connected. Increase volume on both your phone and stereo. |
| Hissing or humming noise. | Ground loop interference. | Enable the Ground Loop Noise Cancellation feature in the TUNAI Connect App. |
| App not connecting to Firefly LDAC. | Bluetooth not connected, app glitch, or network interference. | Ensure your phone's Bluetooth is connected to the Firefly LDAC. Try restarting the app. Some users report disabling Wi-Fi temporarily helps with app connection for firmware updates. |
Troubleshooting Demonstration Video:
Official TUNAI video providing an overview of the Firefly LDAC and its features, including potential troubleshooting insights.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | TF002C-SC-1A |
| Connectivity Technology | Bluetooth 5.0, Auxiliary, USB |
| Audio Codecs Supported | LDAC, AAC, SBC |
| DAC | Cirrus Logic Audiophile Grade 127dB SNR DAC |
| Power Source | Corded Electric (USB powered) |
| Product Dimensions | 0.51 x 6.3 x 0.2 inches (1.3 x 16 x 0.5 cm) |
| Item Weight | 0.388 ounces (11 grams) |
| Special Features | Auto On/Off, Auto Reconnect, Multi-Device Pairing, Built-in Ground Loop Isolator, App Control (EQ, LED Brightness, Firmware Update) |
9. Safety Information
Please read and follow all safety instructions to prevent injury or damage to the device:
- Do not expose the device to water, moisture, or extreme temperatures.
- Avoid dropping or subjecting the device to strong impacts.
- Keep the device away from heat sources, such as radiators or stoves.
- Do not use harsh chemicals or abrasive cleaners on the device.
- Ensure proper ventilation when using the device in enclosed spaces.
- Dispose of the device responsibly according to local electronic waste regulations.
- This device operates using radio frequencies and may cause interference with other electronic devices. Maintain a safe distance from sensitive equipment.
10. Warranty and Support
For product support, warranty information, or technical assistance, please visit the official TUNAI website or contact their customer service. Details can typically be found on the product packaging or the TUNAI brand store on Amazon.
Manufacturer: TUNAI CREATIVE INC.
For the latest information and updates, please refer to the TUNAI Connect App.