1. Introduction
Thank you for choosing the Comiso M20S Bluetooth Speaker. This manual provides essential information for setting up, operating, and maintaining your speaker. Please read it carefully before use to ensure optimal performance and longevity of your device.
2. Package Contents
Please check the package for the following items:
- Comiso M20S Bluetooth Speaker
- USB Charging Cable
- User Manual
3. Product Overview
Familiarize yourself with the various parts of your Comiso M20S speaker.

Image: Top view of the Comiso M20S Bluetooth Speaker, highlighting the control panel with its wooden finish and button layout.

Image: A closer top view of the speaker, detailing the five control buttons: Bluetooth pairing, Volume Down, Play/Pause, Volume Up, and Power.
Control Buttons:
- Bluetooth Button: Press to enter pairing mode.
- '-' (Volume Down) Button: Short press to decrease volume; long press for previous track.
- Play/Pause Button: Press to play or pause audio; answer/end calls.
- '+' (Volume Up) Button: Short press to increase volume; long press for next track.
- Power Button: Long press to power on/off; short press to check battery status.
Ports and Indicators:
- USB Charging Port: For charging the speaker.
- LED Indicator: Shows power, charging, and Bluetooth status.
4. Setup
4.1 Charging the Speaker
Before first use, fully charge the speaker. Connect the provided USB charging cable to the speaker's charging port and a USB power adapter (not included).
- The LED indicator will show charging status.
- A full charge takes approximately 24 hours.
- The speaker offers up to 24 hours of playtime on a full charge.

Image: The Comiso M20S speaker positioned on a wooden desk in a home office setting, emphasizing its long battery life.
4.2 Power On/Off
- To Power On: Long press the Power button until the LED indicator lights up.
- To Power Off: Long press the Power button again until the LED indicator turns off.
4.3 Bluetooth Pairing
The Comiso M20S uses Bluetooth 5.0 for a stable and fast connection up to 100 feet.

Image: An illustration demonstrating the wireless Bluetooth 5.0 connection between the speaker and a mobile device, highlighting the 100-foot range.
- Ensure the speaker is powered on and the LED indicator is blinking, indicating it's in pairing mode.
- On your device (smartphone, tablet, laptop), enable Bluetooth.
- Search for available Bluetooth devices and select "Comiso M20S" from the list.
- Once connected, the LED indicator will turn solid, and you will hear a confirmation sound.
4.4 True Wireless Stereo (TWS) Pairing
Pair two Comiso M20S speakers for a true wireless stereo experience with separated left and right channels.

Image: A visual representation of two Comiso M20S speakers set up in a living room, demonstrating their True Wireless Stereo pairing capability for enhanced sound.
- Ensure both M20S speakers are powered on and not connected to any other Bluetooth device.
- On one speaker (this will be the master), long press the Bluetooth button until you hear a prompt.
- The two speakers will automatically connect to each other. You will hear a confirmation sound once paired.
- Now, connect your device to the master speaker via Bluetooth as described in section 4.3. Audio will play in sync on both speakers.
5. Operating Instructions
5.1 Basic Audio Controls
- Play/Pause: Press the Play/Pause button.
- Volume Up: Short press the '+' button.
- Volume Down: Short press the '-' button.
- Next Track: Long press the '+' button.
- Previous Track: Long press the '-' button.

Image: An exploded diagram of the Comiso M20S speaker, illustrating its internal drivers and components that contribute to its 20W stereo sound output.

Image: The Comiso M20S speaker on a table, with musical notes floating above it, symbolizing its capability to produce intense bass.
5.2 Hands-Free Calling
The built-in speakerphone allows for clear calls directly through the speaker.
- Answer Call: Press the Play/Pause button.
- End Call: Press the Play/Pause button.
- Reject Call: Long press the Play/Pause button.
- Access Voice Input (Siri & Google Now): Press and hold the multi-function button.
6. Maintenance
6.1 Cleaning
- Wipe the speaker with a soft, dry cloth.
- Do not use abrasive cleaners or solvents.
6.2 Storage
- Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- If storing for a long period, charge the battery every few months to maintain its health.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Low battery. | Charge the speaker fully. |
| Cannot pair with Bluetooth device. | Speaker not in pairing mode; device Bluetooth off; too far from speaker. | Ensure speaker is in pairing mode (blinking LED). Turn device Bluetooth on/off. Move device closer to speaker (within 100ft). |
| No sound. | Volume too low; device not connected; incorrect audio source. | Increase speaker and device volume. Re-pair Bluetooth. Check device's audio output settings. |
| TWS pairing fails. | Speakers already connected to other devices. | Disconnect both speakers from any Bluetooth devices before attempting TWS pairing. |
8. Specifications

Image: A visual representation of the Comiso M20S speaker with its key dimensions labeled: 7 inches (length), 2.7 inches (depth), and 3 inches (height).
| Feature | Detail |
|---|---|
| Model Name | M20S |
| Speaker Type | Portable Bluetooth Speaker |
| Connectivity Technology | Bluetooth 5.0, USB |
| Audio Output Mode | Stereo |
| Speaker Maximum Output Power | 30 Watts |
| Battery Life | Up to 24 Hours |
| Battery Capacity | 4400 mAh |
| Charging Time | Approx. 24 Hours |
| Bluetooth Range | Up to 100 Feet (30 meters) |
| Product Dimensions | 7"D x 2.7"W x 3"H (178mm x 70mm x 77mm) |
| Item Weight | 1.6 Pounds (0.73 kg) |
| Special Features | True Wireless Stereo Pairing, Built-in Speakerphone |
9. Warranty and Support
The Comiso M20S Bluetooth Speaker comes with a limited warranty. Please refer to the warranty card included in your package for specific terms and conditions.
For technical support or customer service, please contact Comiso directly through their official website or the contact information provided with your purchase.
Manufacturer: Shenzhen Comiso Digital Technolog Limited





