TRN BT3XS Wireless Bluetooth Upgrade Cable User Manual

1. Introduction

The TRN BT3XS is a neck-type HIFI Bluetooth upgrade cable designed to transform your wired earphones into wireless Bluetooth headphones. Featuring a high-quality Bluetooth 5.3 chip, it ensures a fast, stable, and uninterrupted connection with lower energy consumption, significantly improving transmission efficiency compared to previous versions. This cable offers a convenient magnetic charging design and a long battery life, allowing you to enjoy high-fidelity audio on the go.

2. Package Contents

Please check the package contents upon unboxing:

• 1 pair of swappable + 1 Bluetooth upgrade cable module
• 1 magnetic charging cable
• 1 Instructions manual

3. Specifications

4. Setup

4.1 Connecting to Earphones

The TRN BT3XS cable supports various earphone connector types including 0.75mm, 0.78mm, MMCX, and 2PIN (QDC). Ensure you have the correct cable variant for your earphones.

1. Identify the male end of the Bluetooth cable and the female end of your earphone.
2. Align the connectors carefully. For 2PIN (QDC) connectors, ensure the letter "R" on the male end and the female end are in the same direction.
3. Insert the connectors in parallel until they are securely connected.

4.2 Bluetooth Pairing

1. Power On: Long press the power button for 3 seconds until the indicator light flashes.
2. Pairing Mode: The device will automatically enter pairing mode if not connected to a previously paired device. The indicator light will flash rapidly (e.g., blue and red alternately).
3. Connect: On your smartphone or audio device, enable Bluetooth and search for "TRN BT3XS" in the list of available devices. Select it to connect.
4. Confirmation: Once successfully paired, the indicator light will typically show a steady blue light or flash slowly.

5. Operating Instructions

The TRN BT3XS features aluminum alloy buttons for intelligent control of your audio and calls.

• Headphones On: Long press the power button for 3 seconds.
• Headphones Off: Long press the power button for 6 seconds.
• Volume + / -: Click the volume up (+) or volume down (-) button.
• Play / Pause: Short press the power button.
• Music Previous: Long press the volume down (-) button.
• Music Next: Long press the volume up (+) button.
• Answer / Hang up a call: Short press the power button.

6. Charging

The TRN BT3XS utilizes a convenient magnetic charging design.

1. Connect the magnetic charging cable to the charging port on the BT3XS module.
2. Connect the other end of the USB charging cable to a 5V=1A power source (e.g., a USB wall adapter or computer USB port).
3. During charging, the LED indicator will turn red.
4. Once fully charged (approximately 1-2 hours), the LED indicator may change color or turn off, depending on the specific unit.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the cable and control module. Avoid using harsh chemicals or abrasive materials.
• Storage: When not in use, store the cable in a cool, dry place away from direct sunlight and extreme temperatures.
• Water Resistance: The TRN BT3XS features an IPX6 waterproof level, meaning it is protected against high-pressure water jets from any direction. This makes it suitable for use during rain or sweaty workouts. However, it is not designed for submersion in water.
• Connector Care: Handle the earphone connectors with care to avoid bending or damaging the pins.

8. Troubleshooting

• Cannot Power On: Ensure the battery is charged. Connect the charging cable and try again after a few minutes.
• Cannot Pair: Make sure the device is in pairing mode (indicator flashing). Turn off Bluetooth on other nearby devices that might be trying to connect. Restart your audio device's Bluetooth.
• No Sound: Check if the earphones are securely connected to the cable. Ensure the volume on both the BT3XS and your audio device is turned up. Verify that the BT3XS is successfully paired and connected to your device.
• Intermittent Connection: Ensure there are no significant obstacles between the BT3XS and your audio device. Keep within the effective signal range (>15m).

9. User Tips

• Comfortable Fit: The BT3XS is designed for an 'around the ear' wearing style for a more comfortable and secure fit. Adjust the cable to ensure it sits comfortably behind your ears.
• Optimizing Battery Life: To maximize playback time, avoid using the cable at maximum volume for extended periods.
• Compatibility: While the cable supports common connector types, always double-check the compatibility with your specific earphones before purchase.

10. Warranty and Support

For warranty information or technical support, please contact the retailer or the official TRN customer service. Keep your purchase receipt as proof of purchase.