1. Introduction
Thank you for purchasing the MEGUO A66 Portable Bluetooth Speaker. This manual provides essential information for setting up, operating, and maintaining your speaker. Please read it thoroughly before use to ensure optimal performance and longevity of the product.
2. Safety Information
- Do not expose the speaker to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the speaker to strong impacts.
- Do not disassemble, repair, or modify the speaker yourself. This will void the warranty.
- Keep the speaker away from water and liquids. This product is not waterproof.
- Use only the provided charging cable or a certified Type-C cable for charging.
- Keep out of reach of children.
3. Package Contents
Please check the box for the following items:
- MEGUO A66 Bluetooth Speaker
- Type-C Charging Cable
- User Manual
4. Product Overview
Familiarize yourself with the various parts and controls of your MEGUO A66 speaker.
Image: Front view of the MEGUO A66 speaker, showing the speaker grille, control buttons on top, and the illuminated end caps.
Image: The MEGUO A66 speaker highlighting its multiple playback modes: Bluetooth, TF card, USB drive, and 3.5mm Aux-in.
Image: Detailed view of the input ports on the MEGUO A66 speaker, including Type-C for charging, USB for flash drives, TF card slot, and 3.5mm AUX input.
Control Buttons:
| Button | Function (Short Press) | Function (Long Press) |
|---|---|---|
| Power Button (Power icon) | Play/Pause | Power On/Off |
| Mode Button (M icon) | Switch Playback Mode (Bluetooth/TF/USB/AUX) | Turn LED Lights On/Off |
| Previous Track / Volume Down (- icon) | Previous Track | Volume Down |
| Next Track / Volume Up (+ icon) | Next Track | Volume Up |
5. Setup
5.1 Charging the Speaker
Before first use, fully charge the speaker. Connect the provided Type-C charging cable to the speaker's Type-C port and the other end to a USB power adapter (not included) or a computer's USB port. The LED indicator will show charging status and turn off when fully charged.
- Charging Time: Approximately 3 hours.
- Playtime: Up to 10 hours at 2/3 volume without lights. Playtime may vary based on volume level and light usage.
Image: A woman working at a desk with the MEGUO A66 speaker, illustrating its long playtime (12h), charging time (3h), and battery capacity (1200mAh).
5.2 Powering On/Off
- To Power On: Long press the Power Button until you hear an audible prompt and the LED lights illuminate.
- To Power Off: Long press the Power Button again until you hear an audible prompt and the LED lights turn off.
5.3 Bluetooth Pairing
The speaker will automatically enter Bluetooth pairing mode when powered on for the first time or if no device is connected. The LED lights will flash, indicating it's ready to pair.
- Ensure the speaker is powered on and in Bluetooth mode (if not, short press the Mode Button).
- Enable Bluetooth on your device (smartphone, tablet, computer).
- Search for "MEGUO A66" in the list of available Bluetooth devices.
- Select "MEGUO A66" to connect. Once connected, you will hear a confirmation sound, and the LED lights will stop flashing.
The speaker will automatically reconnect to the last paired device when powered on, if the device's Bluetooth is enabled and within range.
5.4 Connecting via AUX Input
To play audio from devices without Bluetooth, use a 3.5mm audio cable (not included).
- Connect one end of the 3.5mm audio cable to the AUX port on the speaker.
- Connect the other end to the audio output jack of your device.
- The speaker will automatically switch to AUX mode. If not, short press the Mode Button until it enters AUX mode.
5.5 Using TF Card / USB Drive
The speaker supports playing audio files (WAV / MP3 format) directly from a TF (Micro SD) card or a USB flash drive.
- Insert a TF card into the TF card slot or a USB flash drive into the USB port.
- The speaker will automatically detect the storage device and begin playing audio.
- If it does not switch automatically, short press the Mode Button to cycle through modes until it enters TF card or USB mode.
6. Operating Instructions
6.1 Basic Playback
- Play/Pause: Short press the Power Button.
- Volume Up: Long press the + Button.
- Volume Down: Long press the - Button.
- Next Track: Short press the + Button.
- Previous Track: Short press the - Button.
6.2 True Wireless Stereo (TWS) Function
You can connect two MEGUO A66 speakers wirelessly to achieve a louder, stereo sound experience. This function is only available in Bluetooth mode.
Image: Two MEGUO A66 speakers shown wirelessly connected, indicating the True Wireless Stereo feature for enhanced sound.
Image: A setup demonstrating two MEGUO A66 speakers wirelessly connected to a smartphone, providing a stereo audio experience.
- Ensure both MEGUO A66 speakers are powered on and not connected to any Bluetooth device.
- On one of the speakers (this will be the primary speaker), double-press the Power Button. The speaker will search for another A66 speaker.
- The two speakers will automatically pair with each other. You will hear a confirmation sound once connected.
- Now, enable Bluetooth on your device and search for "MEGUO A66". Connect to this single entry. Both speakers will now play audio in stereo.
- To disconnect TWS, double-press the Power Button on either speaker.
6.3 Managing LED Lights
The speaker features colorful LED lights on its ends.
- Turn Lights On/Off: Long press the Mode Button.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker's surface. Do not use abrasive cleaners or solvents.
- Storage: When not in use for extended periods, store the speaker in a cool, dry place, away from direct sunlight and extreme temperatures. It is recommended to charge the speaker at least once every three months to maintain battery health.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Low battery. | Charge the speaker fully. |
| Cannot pair via Bluetooth. | Speaker not in pairing mode; device Bluetooth off; too far from speaker. | Ensure speaker is in Bluetooth pairing mode (flashing LED). Turn on device Bluetooth. Move device closer to speaker (within 10 meters). Forget "MEGUO A66" on your device and try pairing again. |
| No sound. | Volume too low; incorrect mode; device not playing. | Increase speaker and device volume. Ensure correct playback mode (Bluetooth, AUX, TF, USB). Check if audio is playing on the connected device. |
| Sound distortion. | Volume too high; low battery; interference. | Reduce volume on speaker and device. Charge the speaker. Move away from other electronic devices that may cause interference. |
| TF card/USB drive not recognized. | Incorrect file format; card/drive not inserted correctly; corrupted data. | Ensure audio files are WAV/MP3 format. Reinsert the TF card/USB drive. Try a different TF card/USB drive. |
| TWS pairing fails. | Speakers already connected to other devices; too far apart. | Ensure both speakers are disconnected from all Bluetooth devices. Place speakers close to each other. Follow TWS pairing steps carefully. |
9. Specifications
| Feature | Detail |
|---|---|
| Model | A66 |
| Output Power | 5W |
| Connectivity | Bluetooth, TF Card, USB Drive, 3.5mm AUX |
| Bluetooth Version | (Not specified in input, assuming standard) |
| Battery Capacity | 1200mAh (Lithium Ion) |
| Playtime | Up to 10 hours (at 2/3 volume, lights off) |
| Charging Time | Approximately 3 hours |
| Dimensions (L x W x H) | 11.6 x 8.5 x 8.5 cm (4.5 x 3.3 x 3.3 inches) |
| Weight | Approximately 300g (under 8 ounces) |
| Material | Plastic |
| Color | Pink |
| Waterproof | No |
Image: Dimensions of the MEGUO A66 speaker, showing its length (11.6cm), height (8.5cm), and depth (8.5cm).
10. Warranty and Support
MEGUO products are designed and manufactured to the highest quality standards. For information regarding warranty coverage, technical support, or customer service, please refer to the contact information provided on the product packaging or visit the official MEGUO website.
Please retain your proof of purchase for warranty claims.





