T66 Bluetooth 5.3 Audio Receiver Transmitter User Manual

1. Introduction

The T66 is a versatile Bluetooth 5.3 audio adapter designed to seamlessly switch between receiver (RX) and transmitter (TX) modes. This 2-in-1 device allows you to add Bluetooth capabilities to non-Bluetooth audio equipment, enabling wireless audio streaming and hands-free calling. It features a compact design, built-in microphone, and a long-lasting battery, making it ideal for use with TVs, PCs, headphones, car audio systems, and more.

Figure 1: T66 Bluetooth 5.3 Audio Receiver Transmitter

2. Package Contents

Please check the box for the following items:

• 1x T66 Bluetooth 5.3 Audio Transmitter/Receiver
• 1x 3.5mm Audio Metal Head (AUX cable)
• 1x User Manual
• 1x Type-C Charging Power Cord

Figure 2: Package Accessories

3. Product Overview

The T66 features a compact design with essential controls and ports for easy operation.

Figure 3: T66 Device Layout and Controls

Controls and Indicators:

• Multifunctional Keys: Short press for next/previous song. Long press for volume up/down.
• 3.5mm Audio Jack: For connecting to audio sources or output devices.
• RX/TX Mode Switch: Toggles between Receiver and Transmitter modes.
• MIC Talking: Built-in microphone for hands-free calls.
• Indicator Light: Displays device status (pairing, connected, charging).
• Type-C Fast Charging Port: For charging the device.
• Lavalier Design: Integrated clip for easy portability.

4. Specifications

Figure 4: T66 Product Parameters

5. Setup

5.1 Charging the Device

Before first use, fully charge the T66 using the provided Type-C charging cable. Connect the cable to the Type-C port on the device and a USB power source. The indicator light will show charging status. The device can be used while charging if the battery is low.

Figure 5: Built-in High Capacity Battery

5.2 Transmit Mode (TX) Setup

Use TX mode to transmit audio from a non-Bluetooth device (e.g., TV, PC) to Bluetooth headphones or speakers.

1. Connect the T66 to your audio equipment (e.g., TV, PC) using the 3.5mm AUX cable.
2. Slide the switch button on the T66 to the TX position.
3. Turn on the T66 by long-pressing the multifunction button. The red indicator light will flash rapidly, indicating it is ready for pairing.
4. Ensure your Bluetooth receiving device (headphones, speaker) is in pairing mode.
5. The T66 will automatically search for and connect to nearby Bluetooth devices. Once connected, the red light will remain solid.

Figure 6: Launch Mode (TX) Pairing Steps

Figure 7: Bluetooth Transmit Mode (TX) Diagram

5.3 Receive Mode (RX) Setup

Use RX mode to receive audio from a Bluetooth-enabled device (e.g., smartphone, tablet) and output it to a non-Bluetooth audio system (e.g., old stereo, car AUX).

1. Connect the T66 to your audio equipment (e.g., power amplifier, general speaker, car audio) using the 3.5mm AUX cable.
2. Slide the switch button on the T66 to the RX position.
3. Turn on the T66 by long-pressing the multifunction button. The blue indicator light will flash rapidly, indicating it is ready for pairing.
4. On your Bluetooth-enabled device (phone, iPad), search for Bluetooth devices and select "T66" to pair.
5. Once connected, the blue light will remain solid.

Figure 8: Bluetooth Receiver Mode (RX) Diagram

Note: The T66 can only operate in one mode (TX or RX) at a time. Ensure the switch is in the correct position for your desired function.

6. Operating Instructions

6.1 Audio Playback Control

• Next Song: Short press the multifunction button.
• Previous Song: Short press the multifunction button.
• Volume Up: Long press the multifunction button.
• Volume Down: Long press the multifunction button.

6.2 Hands-Free Calling

When connected to a smartphone in RX mode (e.g., in a car via AUX), the built-in microphone allows for hands-free calling.

• Answer/End Call: Short press the multifunction button.
• Reject Call: Long press the multifunction button.

Figure 9: Hands-Free Calling in Car

7. Maintenance

• Keep the device dry and away from moisture.
• Clean the device gently with a soft, dry cloth.
• Avoid exposing the device to extreme temperatures (hot or cold).
• The frosted casing is designed to be anti-drop and shockproof, but avoid severe impacts.
• Store the device in a cool, dry place when not in use.

Figure 10: Durable Frosted Casing

8. Troubleshooting

• Device won't turn on: Ensure the device is charged. Connect it to a power source using the Type-C cable.
• Cannot pair with a device:
  1. Check that the T66 is in the correct mode (TX or RX) for your intended use.
  2. Ensure the T66 is in pairing mode (rapidly flashing indicator light).
  3. Make sure your target Bluetooth device (headphones, speaker, phone) is also in pairing mode and within the 10-meter range.
  4. Turn off and on both devices and try pairing again.
• No audio output/input:
  1. Verify that the 3.5mm AUX cable is securely connected to both the T66 and your audio equipment.
  2. Check the volume levels on both the T66 and the connected audio device.
  3. Ensure the T66 is successfully paired and connected (solid indicator light).
• Audio lag or poor connection:
  1. Ensure the T66 and the connected device are within the 10-meter range.
  2. Minimize obstacles between the devices that might interfere with the Bluetooth signal.
  3. Avoid using the device in environments with strong electromagnetic interference.

9. User Tips

• To transform an old stereo or amplifier into a Bluetooth-enabled system, use the T66 in Receive Mode (RX). Connect the T66 to the stereo's 3.5mm audio input.
• For private listening from a TV or PC, use the T66 in Transmit Mode (TX). Connect the T66 to the TV's 3.5mm audio output and pair with your Bluetooth headphones. This allows for late-night viewing without disturbing others.
• The device supports simultaneous use while charging, which is convenient for extended listening or transmitting sessions.
• Take advantage of the built-in clip for easy portability, especially when using it with headphones for hands-free calls on the go.

Figure 11: Wired to Wireless Stereo Conversion (RX Mode)

Figure 12: Private TV Listening (TX Mode)

10. Warranty and Support

This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For technical support or warranty claims, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.