Introduction
Thank you for choosing the Monster Round One Bluetooth Speaker. This portable wireless speaker is designed to deliver high-quality audio with robust bass and clear sound, suitable for various environments including home, outdoor activities, and even wet conditions thanks to its IPX8 waterproof rating. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your speaker to ensure optimal performance and longevity.

Image: The Monster Round One Bluetooth Speaker, a compact black speaker with a woven texture and a black lanyard, shown with water splashing around it, highlighting its waterproof design.
Safety Information
- Do not expose the speaker to extreme temperatures or direct sunlight for prolonged periods.
- Avoid dropping or subjecting the speaker to strong impacts.
- Keep the charging port dry before connecting the charging cable.
- Do not attempt to disassemble or repair the speaker yourself. Refer to qualified service personnel.
- Use only the provided charging cable or a certified equivalent.
What's in the Box
- Monster Round One Bluetooth Speaker
- 3.5mm data cable
- Detachable suction cup
- Locking Climbing Carabiner Clips
- Quick Start Guide
Product Overview
The Monster Round One speaker features a compact, circular design with intuitive controls on its front surface. It includes a durable lanyard for portability and a covered charging port for water resistance.
Controls and Indicators:
- Power Button: Located on the side, used for turning the speaker on/off.
- Volume Down (-): Decreases playback volume.
- Play/Pause Button (Triangle): Controls music playback and call functions.
- Volume Up (+): Increases playback volume.
- LED Indicator: Displays power, charging, and Bluetooth status.
- Charging Port: USB Type-C port, located under a protective cover.

Image: The Monster Round One Bluetooth Speaker shown next to a laptop, illustrating its compact size and the visible control buttons (- , Play/Pause, +) on its front surface.
Setup
Charging the Speaker:
- Locate the USB Type-C charging port on the speaker, usually covered by a rubber flap.
- Open the flap and connect the provided USB Type-C cable to the speaker.
- Connect the other end of the USB cable to a USB power adapter (not included) or a computer's USB port.
- The LED indicator will show charging status (e.g., red for charging, off or green for fully charged).
- Ensure the flap is securely closed after charging to maintain waterproof integrity.
Bluetooth Pairing:
- Press and hold the Power button to turn on the speaker. The LED indicator will flash, indicating it's in pairing mode.
- On your device (smartphone, tablet, computer), enable Bluetooth.
- Search for available Bluetooth devices and select "Monster Round One" from the list.
- Once connected, the LED indicator will turn solid, and you will hear an audible confirmation.

Image: A smartphone screen displaying a successful Bluetooth connection to "Monster Round One", with the speaker nearby, illustrating the seamless Bluetooth 5.4 pairing process.
Operating Instructions
Basic Functions:
- Power On/Off: Press and hold the Power button.
- Play/Pause: Press the Play/Pause button once.
- Volume Control: Press the '+' button to increase volume, '-' button to decrease volume.
- Next Track: Press and hold the '+' button.
- Previous Track: Press and hold the '-' button.
Hands-Free Calling:
- Answer Call: Press the Play/Pause button once.
- End Call: Press the Play/Pause button once during a call.
- Reject Call: Press and hold the Play/Pause button.
True Wireless Stereo (TWS) Pairing:
To achieve a stereo sound experience, you can pair two Monster Round One speakers together.
- Ensure both speakers are charged and turned off.
- Turn on both speakers. They will enter Bluetooth pairing mode.
- On one speaker (this will be the primary speaker), double-press the Play/Pause button. The speakers will attempt to connect to each other.
- Once successfully paired, you will hear an audible confirmation, and the LED indicators on both speakers will change to indicate TWS connection.
- Now, connect your device to the primary speaker via Bluetooth as described in the 'Bluetooth Pairing' section.

Image: A banner illustrating two Monster Round One speakers wirelessly connected to a single smartphone, demonstrating the True Wireless Stereo pairing capability for an immersive audio experience.
Maintenance
Cleaning:
- Wipe the speaker with a soft, damp cloth.
- Do not use abrasive cleaners, alcohol, or chemical solvents.
- Ensure the charging port is dry before cleaning or charging.
Storage:
- Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- If storing for an extended period, charge the battery to approximately 50% every few months to preserve battery life.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not turn on. | Battery is depleted. | Charge the speaker fully. |
| Cannot pair with Bluetooth device. | Speaker is not in pairing mode or too far. | Ensure speaker is in pairing mode (flashing LED). Move speaker closer to device. Turn off and on Bluetooth on your device. |
| No sound or low volume. | Volume too low on speaker or device; incorrect source. | Increase volume on both speaker and connected device. Ensure correct audio output is selected on your device. |
| Sound distortion. | Volume too high; low battery. | Reduce volume. Charge the speaker. |
| TWS pairing fails. | Speakers not reset or too far apart. | Ensure both speakers are disconnected from other devices. Try resetting both speakers and re-attempt TWS pairing. Keep speakers close during pairing. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | MS62116 |
| Brand | Monster |
| Connectivity Technology | Bluetooth 5.4 |
| Waterproof Rating | IPX8 (Submersible up to 1 meter for 30 minutes) |
| Speaker Type | Portable Speaker |
| Audio Output Mode | Stereo (with TWS pairing) |
| Speaker Maximum Output Power | 15 Watts |
| Battery Life | Up to 24 hours (at appropriate volume) |
| Battery Type | 1 CR5 battery (included) |
| Product Dimensions | 3.9"D x 1.7"W x 3.9"H |
| Item Weight | 13.4 ounces |
| UPC | 810079705993 |
Warranty and Support
This Monster Round One Bluetooth Speaker comes with a limited warranty. For specific details regarding the warranty period and coverage, please refer to the Quick Start Guide included in your product packaging or visit the official Monster website.
If you encounter any issues or have questions about your speaker, please contact Monster customer support. Contact information can typically be found on the manufacturer's website or in the product documentation.





