1. Introduction
The Makerfire M6 is a versatile Bluetooth 5.0 audio adapter designed to function as both a transmitter and a receiver. It allows you to wirelessly stream audio from non-Bluetooth devices to Bluetooth headphones/speakers (Transmitter mode) or stream audio from Bluetooth-enabled devices to wired speakers/car stereos (Receiver mode). This device supports multiple audio input/output options including AUX, RCA, Optical, and Coaxial, and features an HD LED display, NFC pairing, and TF card/USB disk playback.
2. Product Overview
2.1 Package Contents
Before you begin, please ensure all items are present in the package:
- Bluetooth 5.0 Adapter (M6)
- Infrared Remote Control
- 3.5mm AUX Cable
- 3.5mm RCA Cable
- USB Charging Cable
- User Manual (English)

Figure 2.1: Package Contents
2.2 Device Interfaces and Controls
The M6 adapter offers a variety of interfaces for broad compatibility:
- 1. Memory Card Playback: For playing audio files directly from a USB flash drive.
- 2. TF Card Playback: For playing audio files directly from a TF (MicroSD) card.
- 3. RCA Interface (Input/Output): Red and white ports for analog audio connection.
- 4. Coaxial Input Interface: For digital audio input.
- 5. Optical Input Interface: For digital audio input.
- 6. AUX Audio Interface: 3.5mm jack for analog audio input/output.
- 7. Charging Interface: USB-C port for power supply.
- 8. Receive/Transmit Button: To switch between RX (Receiver) and TX (Transmitter) modes.

Figure 2.2: Multiple Interface Options
3. Setup
3.1 Powering On/Off
Connect the device to a power source using the provided USB charging cable. The device will automatically power on. To power off, disconnect the power source. Note: The remote control's red button does not function as a power on/off switch for the device.
3.2 Connecting to Audio Devices
The M6 adapter can connect to various audio systems. Identify the appropriate cable for your setup:
- AUX Connection: Use the 3.5mm AUX cable to connect the M6 to devices with a 3.5mm audio jack (e.g., car audio, wired speakers).
- RCA Connection: Use the RCA cable (red and white plugs) to connect to devices with RCA audio input/output (e.g., home stereo systems, older TVs).
- Optical/Coaxial Connection: For digital audio, use an optical fiber cable or coaxial cable to connect to compatible devices (e.g., modern TVs, soundbars).

Figure 3.1: Connecting to a TV with various audio inputs
4. Operating Instructions
4.1 Switching Modes (TX/RX)
The M6 adapter supports two main modes: Transmitter (TX) and Receiver (RX). Press the 'Receive/Transmit Button' (labeled 8 in Figure 2.2) to switch between modes. The HD LED display will indicate the current mode (TX or RX).

Figure 4.1: Bluetooth Receiver and Transmitter Modes
4.2 Receiver (RX) Mode
In RX mode, the M6 receives Bluetooth audio from your phone, tablet, or laptop and outputs it to a wired audio system.
- Switch the M6 to RX mode. The LED display will show "RX".
- Connect the M6 to your wired speakers, home stereo, or car audio system using the appropriate AUX or RCA cable.
- Enable Bluetooth on your mobile device and search for "M6" in the list of available devices.
- Select "M6" to pair. Once paired, audio from your mobile device will play through your wired audio system.
4.3 Transmitter (TX) Mode
In TX mode, the M6 transmits audio from non-Bluetooth devices (like a TV or PC) to Bluetooth headphones or speakers.
- Switch the M6 to TX mode. The LED display will show "TX".
- Connect the M6 to your TV, PC, or other audio source using the appropriate AUX, RCA, Optical, or Coaxial cable.
- Put your Bluetooth headphones or speaker into pairing mode.
- The M6 will automatically search for and connect to nearby Bluetooth audio devices. Once connected, audio from your source device will play through your Bluetooth headphones/speakers.
4.4 TF Card and USB Disk Playback
The M6 can play audio files directly from a TF card or USB flash drive.
- Insert a TF card into the TF card slot (2) or a USB flash drive into the USB port (1).
- The device will automatically switch to playback mode. Use the remote control or the device's buttons to control playback (play/pause, next/previous track, volume).

Figure 4.2: Car Transmitter and USB/TF Card Playback
4.5 NFC Pairing
For compatible mobile phones/tablets with NFC functionality, you can quickly pair with the M6:
- Ensure the M6 is in RX mode.
- Enable NFC on your mobile device.
- Tap your mobile device near the NFC area on the M6. Follow the prompts on your phone to complete pairing.
4.6 Hands-Free Calling
When the M6 is in RX mode and paired with your smartphone, it supports hands-free calling through its built-in microphone.
- When a call comes in, press the Play/Pause button on the M6 or remote to answer.
- Press the Play/Pause button again to end the call.
4.7 Remote Control Usage
The included infrared remote control allows for convenient operation from a distance of 5-10 meters. Functions include mode switching, volume control, track selection, and play/pause.

Figure 4.3: Remote Control with Important Note
Important Note: The red power button on the remote control does not have power on/off functionality for the device itself. The device powers on when connected to a power source and powers off when disconnected.
5. Maintenance
- Keep the device dry. Avoid exposure to moisture or liquids.
- Clean the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid extreme temperatures.
- Do not attempt to disassemble or repair the device yourself. This will void the warranty.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Not connected to power or power source faulty. | Ensure the USB charging cable is securely connected to a working power source. |
| Cannot pair with Bluetooth device. | Device not in pairing mode; Bluetooth device too far; interference. | Ensure M6 is in the correct TX/RX mode and pairing mode. Keep devices within 10 meters. Turn off other Bluetooth devices. |
| No sound. | Incorrect cable connection; wrong mode; volume too low. | Check all audio cable connections. Ensure M6 is in the correct TX/RX mode. Adjust volume on both M6 and connected audio device. |
| Remote control not working. | Battery depleted; obstruction; out of range. | Replace remote control battery. Ensure no obstructions between remote and device. Operate within 5-10 meters. |
| Audio cuts in/out. | Distance too far; interference. | Reduce distance between M6 and paired Bluetooth device. Minimize interference from other wireless devices. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | M6 |
| Bluetooth Version | 5.0 |
| Wireless Communication Standard | Bluetooth |
| Compatible Devices | Tablet, Desktop, Bluetooth Speakers, Bluetooth Headphones |
| Hardware Interface | USB, AUX (3.5mm), RCA, Optical, Coaxial |
| Battery Capacity | 500mAh (Built-in) |
| Playback Time | 8-10 hours (approx.) |
| Wireless Range | Up to 10 meters (26 feet) |
| Special Features | NFC Pairing, HD LED Display, TF Card/USB Disk Playback, Hands-free Calling |
| Package Dimensions | 12 x 11.9 x 3.7 cm; 160 g |
8. Warranty and Support
8.1 Warranty Information
This product comes with a 1-year warranty from the date of purchase. Please retain your proof of purchase for warranty claims.
8.2 Customer Support
If you encounter any issues with your Makerfire M6 Bluetooth Adapter, please contact our customer support team. We aim to respond within 24 hours to confirm the problem and propose a suitable solution.
For support, please visit the Makerfire store on Amazon or use the contact information provided with your purchase.