OQIMAX Bluetooth 5.3 AUX Adapter: 2-in-1 Transmitter & Receiver User Manual

Introduction

The OQIMAX Bluetooth 5.3 AUX Adapter is a versatile 2-in-1 device designed to add Bluetooth capabilities to non-Bluetooth audio equipment. It functions as both a transmitter (TX) to send audio from non-Bluetooth sources to Bluetooth headphones/speakers, and a receiver (RX) to enable Bluetooth audio streaming on wired speakers, car stereos, or headphones. This manual provides detailed instructions for its operation and maintenance.

Product Overview

Key Features

• Bluetooth 5.3: Equipped with the latest Bluetooth 5.3 chipset for stable connection and faster transmission.
• 2-in-1 Functionality: Operates as both a Bluetooth audio transmitter (TX) and receiver (RX).
• Hands-Free Calling: Built-in microphone for convenient hands-free communication in RX mode.
• Type-C Fast Charging: Charges fully in approximately 1 hour.
• TF Card Playback: Supports direct music playback from a TF (MicroSD) card.
• Compact Design: Portable and easy to carry.
• Safety Protections: Includes overvoltage, short-circuit, and over-temperature protection.

Package Contents

• 1 x OQIMAX Wireless Bluetooth Adapter
• 1 x USB Type-C Charging Cable
• 1 x User Manual

Device Layout

1. Microphone/Status Indicator Light: Displays device status and functions as a microphone.
2. Multifunction Button: Power on/off, play/pause, answer/end calls.
3. Previous Song / Volume - Button: Short press for previous track, long press for volume down.
4. Next Song / Volume + Button: Short press for next track, long press for volume up.
5. TF Card Slot: Insert a MicroSD card for direct music playback.
6. Type-C Charger Port: For charging the device.
7. RX/TX Switch Button: Toggle between Receiver (RX) and Transmitter (TX) modes.

Setup

Charging the Device

Before first use, fully charge the adapter. The device supports charging while in use.

• Connect the provided USB Type-C charging cable to the adapter's Type-C port and a standard USB power source (e.g., wall adapter, computer USB port).
• The adapter charges fully in approximately 0.5-1 hour.

Power On/Off

• To power on, press and hold the Multifunction Button for 3 seconds.
• To power off, press and hold the Multifunction Button for 3 seconds.

Operating Modes

Transmitter (TX) Mode

Use TX mode to send audio from non-Bluetooth devices (e.g., TV, computer, MP3 player) to Bluetooth headphones or speakers.

1. Switch the RX/TX button to the 'TX' position.
2. Insert the adapter's 3.5mm audio jack into the audio output port of your non-Bluetooth device (e.g., computer, TV, game console, CD player, MP3).
3. Press and hold the Multifunction Button to power on the adapter. The red indicator light will flash, indicating pairing mode.
4. Turn on your Bluetooth headphones or speaker and set them to pairing mode.
5. The adapter will automatically pair with your Bluetooth device within 1-3 minutes.
6. Once paired, the red indicator light will remain solid.

Receiver (RX) Mode

Use RX mode to receive audio from Bluetooth-enabled devices (e.g., smartphone, tablet) and play it through wired speakers, car audio systems, or headphones.

1. Switch the RX/TX button to the 'RX' position.
2. Insert the adapter's 3.5mm audio jack into the audio input port of your wired audio device (e.g., car stereo, wired headphones, amplifier).
3. Press and hold the Multifunction Button to power on the adapter. The blue indicator light will flash, indicating pairing mode.
4. On your smartphone or tablet, search for Bluetooth devices and select 'D28' to pair.
5. Once paired, the blue indicator light will remain solid.

TF Card Playback Mode

The adapter supports direct music playback from a TF (MicroSD) card.

1. Insert a TF card with music files into the TF card slot.
2. Long press the Previous Song and Next Song buttons simultaneously for 2 seconds to switch to TF card mode.
3. Use the Previous Song and Next Song buttons for track control.

Hands-Free Calling (RX Mode)

When in Receiver (RX) mode and paired with your smartphone, the adapter allows for hands-free calls.

• To answer an incoming call, click the Multifunction Button.
• To end a call, click the Multifunction Button again.

Maintenance

To ensure the longevity and optimal performance of your OQIMAX Bluetooth adapter, please follow these maintenance guidelines:

• Keep Dry: Avoid exposing the device to moisture, rain, or liquids.
• Clean Gently: Use a soft, dry cloth to clean the device. Do not use harsh chemicals or abrasive cleaners.
• Avoid Extreme Temperatures: Do not store or operate the device in extremely hot or cold environments.
• Handle with Care: Avoid dropping or subjecting the device to strong impacts.
• Charging: If the device will not be used for an extended period, charge it at least once every three months to maintain battery health.
• No Disassembly: Do not attempt to disassemble, modify, or repair the device yourself. This may void the warranty and cause damage.

Troubleshooting

If you encounter issues with your OQIMAX Bluetooth adapter, please refer to the following common solutions:

• Pairing Failure:
  If the adapter fails to pair with your Bluetooth device, power off both the adapter and the target Bluetooth device. Restart both devices and attempt the pairing process again. Ensure no other Bluetooth devices are actively trying to connect, which could cause interference.
• No Sound:
  Check that the adapter is correctly inserted into the audio input/output port of your non-Bluetooth device or wired audio system. Ensure the volume is turned up on both the adapter and the connected audio device. Verify that the correct mode (TX or RX) is selected for your intended use.
• Interference or Disconnections:
  Bluetooth range is typically 10-15 meters (33-49 feet) in open areas. Obstacles like walls or other electronic devices can reduce this range. Try moving the adapter closer to the paired device. Turn off other nearby Bluetooth devices to minimize potential interference.
• Short Battery Life:
  Ensure the device is fully charged before use. Battery life can vary based on usage volume and environmental conditions. If the battery life significantly decreases over time, it may indicate battery degradation.
• TF Card Not Playing:
  Ensure the TF card is inserted correctly and contains compatible audio files (e.g., MP3). Make sure you have switched to TF card mode by long-pressing the 'Previous Song' and 'Next Song' buttons simultaneously for 2 seconds.

Specifications

Warranty and Support

For warranty information, please refer to the documentation included with your purchase or the official OQIMAX website. If you require technical support or have questions not covered in this manual, please contact OQIMAX customer service through the contact details provided with your product or on their official support channels.