TROND BT-DUO S Bluetooth 5.0 Transmitter Receiver User Manual

Introduction

The TROND BT-DUO S is a versatile 2-in-1 Bluetooth 5.0 audio adapter that functions as both a transmitter (TX) and a receiver (RX). It is designed to bring wireless audio capabilities to a wide range of devices, from TVs and PCs to wired headphones and home stereo systems. Featuring aptX and aptX Low Latency support, it ensures high-quality audio with minimal delay, making it ideal for watching videos without noticeable lip-sync issues.

This manual provides detailed instructions on setting up, operating, and maintaining your TROND BT-DUO S, along with troubleshooting tips and product specifications.

Package Contents

Before you begin, please ensure all items are present in the package:

• TROND BT-DUO S 3.5mm Bluetooth V5.0 Transceiver with aptX Low Latency
• 3.5mm male to 3.5mm male aluminum audio adapter
• 3.5mm male to 3.5mm male audio cable (50cm extra-long)
• 3.5mm female to RCA male audio cable
• USB to micro USB charging cable
• User manual (this guide)

Figure 1: Contents of the TROND BT-DUO S package. Includes the main unit, audio adapters, cables, and user guide.

Product Overview

Familiarize yourself with the TROND BT-DUO S device and its various ports and buttons.

Figure 2: Top view of the TROND BT-DUO S, highlighting the Multi-Function Button (MFB) and LED indicator.

Figure 3: Side view of the TROND BT-DUO S, showing the TX/RX mode switch, volume control buttons, 3.5mm Aux-In port, and Micro USB charging port.

The LED indicator provides visual feedback on the active audio codec. For optimal low latency, ensure your connected device also supports aptX Low Latency.

Setup and Charging

Initial Charging

Before first use, fully charge your TROND BT-DUO S. Connect the micro USB charging cable to the device's charging port and the other end to a USB power source (e.g., computer USB port, USB wall adapter).

Figure 4: Charging the TROND BT-DUO S. The LED indicator will show red during charging and turn off when fully charged.

• The LED indicator will glow red during charging.
• Once fully charged (approximately 2 hours), the red LED will turn off.
• The device can be used while charging.

Operating Modes

The TROND BT-DUO S supports two primary operating modes: Transmitter (TX) and Receiver (RX). Ensure the mode switch is set correctly before powering on the device.

1. Transmitter Mode (TX)

In TX mode, the TROND BT-DUO S transmits audio wirelessly from non-Bluetooth devices (e.g., TV, iPod, MP3 player) to Bluetooth-enabled headphones or speakers.

1. Set the mode switch to TX before powering on.
2. Connect the TROND BT-DUO S to your audio source's 3.5mm audio output port using the provided audio cable. If your TV only has a digital optical audio out, you will need a different TROND model (BT-DUO X).
3. Power on the device by pressing and holding the Multi-Function Button (MFB) for 3 seconds until the blue LED flashes twice quickly.
4. For first-time pairing, the device will automatically enter pairing mode (blue and red LEDs flash alternately). For subsequent pairings, quickly double-tap the MFB to enter pairing mode.
5. Put your Bluetooth headphones or speaker into pairing mode.
6. Once successfully paired, the blue LED on the TROND BT-DUO S will stay solid.

Figure 5: TROND BT-DUO S in Transmitter (TX) mode, enabling wireless audio from a TV to Bluetooth headphones. Ideal for watching TV without disturbing others.

2. Receiver Mode (RX)

In RX mode, the TROND BT-DUO S receives audio wirelessly from Bluetooth-enabled devices (e.g., smartphone, tablet) and outputs it to non-Bluetooth audio devices like wired headphones, speakers, or car stereo systems.

1. Set the mode switch to RX before powering on.
2. Connect the TROND BT-DUO S to your wired headphones or speaker's 3.5mm audio input port using the provided audio cable.
3. Power on the device by pressing and holding the MFB for 3 seconds until the blue LED flashes twice quickly.
4. For first-time pairing, the device will automatically enter pairing mode (blue and red LEDs flash alternately). For subsequent pairings, quickly double-tap the MFB to enter pairing mode.
5. On your Bluetooth-enabled device (e.g., smartphone), enable Bluetooth and search for "TROND BT-DUO S" in the list of available devices.
6. Select "TROND BT-DUO S" to pair. Once successfully paired, the blue LED on the TROND BT-DUO S will stay solid.
7. You can now play audio from your Bluetooth device through your wired headphones/speakers.

Figure 6: TROND BT-DUO S in Receiver (RX) mode, allowing a smartphone to stream audio wirelessly to wired headphones or a home stereo system.

Volume Control (RX Mode Only)

In RX mode, you can control the volume and track selection directly from the TROND BT-DUO S:

• Volume Up: Quick press the "+" button.
• Track Forward: Long press the "+" button.
• Volume Down: Quick press the "-" button.
• Track Backward: Long press the "-" button.
• Play/Pause: Quick press the MFB.

Note: Volume and track control buttons only work in RX mode.

Advanced Features

Dual Stream (TX Mode) / Multi-Point (RX Mode)

The TROND BT-DUO S supports connecting to two Bluetooth devices simultaneously in TX mode (Dual Stream) and two source devices in RX mode (Multi-Point). However, when connecting to two devices in TX mode, the audio codec will be downgraded to SBC to ensure compatibility.

Figure 7: Comparison of audio latencies for different codecs (SBC, aptX, aptX Low Latency) and the dual connection capability of the TROND BT-DUO S.

Maintenance and Care

• Keep the device dry. Do not expose it to moisture or extreme temperatures.
• Clean the device with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
• Store the device in a cool, dry place when not in use.
• Avoid dropping or subjecting the device to strong impacts.

Troubleshooting

Device not powering on:

• Ensure the device is fully charged.
• Press and hold the MFB for at least 3 seconds.

Cannot pair with a device:

• Ensure the TROND BT-DUO S is in the correct mode (TX or RX) for your intended use.
• Make sure both devices are in pairing mode and within close proximity (within 10 meters/33 feet).
• Clear previous pairing records on both the TROND BT-DUO S and your target device. To reset TROND BT-DUO S, refer to the "Frequent Asked Questions" section in the original user manual (if available).
• Restart both devices and try pairing again.

No audio or poor audio quality:

• Check all cable connections to ensure they are secure.
• Verify that the audio source is playing and its volume is turned up.
• Ensure the volume on the receiving device (headphones/speakers) is also turned up.
• If experiencing latency in TX mode, ensure your receiving Bluetooth headphones/speakers also support aptX Low Latency. Otherwise, the codec will revert to aptX or SBC, which have higher latencies.
• Avoid placing the device near sources of interference (e.g., Wi-Fi routers, microwaves).

Device gets stuck or buttons stop working:

• Press and hold the MFB, then plug in the external USB charger to shut down the BT-DUO S. This will not delete pairing records.

Specifications

Warranty and Support

For warranty information and technical support, please refer to the official TROND website or contact TROND customer service directly. Contact details can typically be found on the product packaging or the TROND official store page.

You can visit the TROND Store for more information: TROND Official Store