Monster Monster Shock Pro Bluetooth Speaker S20
Monster Shock Pro Bluetooth Speaker User Manual
Model: Monster Shock Pro Bluetooth Speaker S20
Introduction
Thank you for choosing the Monster Shock Pro Bluetooth Speaker. This portable wireless speaker is designed to deliver powerful, pure sound with impressive deep bass, making it ideal for both indoor and outdoor use. This manual provides detailed instructions on how to set up, operate, maintain, and troubleshoot your speaker to ensure optimal performance and longevity. Please read this manual thoroughly before using the product.

Image: The Monster Shock Pro Bluetooth Speaker, a rectangular black speaker with a red accent line and a black carrying strap attached.
Product Overview and Key Features
The Monster Shock Pro Bluetooth Speaker is engineered for an exceptional audio experience. Its robust design and advanced features ensure high-quality sound and versatile usage.
- Exceptional Audio Quality: Delivers powerful, pure sound with stunning clarity and detail.
- Impressive Deep Bass: Features 100W deep bass boost for rich, resonant lows.

Image: A graphic representation of the speaker's internal components, highlighting two large speaker cones emitting sound waves, with "100W" prominently displayed, indicating powerful audio output.
- Versatile EQ Settings: Three tailored modes (Indoors, Outdoors, Deep Bass) to optimize sound.

Image: The Monster Shock Pro speaker positioned between two scenes: one depicting an indoor gathering and another an outdoor setting, illustrating the speaker's adaptable EQ modes for different environments.
- True Wireless Stereo (TWS): Connect two Shock Pro speakers for an immersive stereo surround sound experience.

Image: Two Monster Shock Pro speakers placed on a beach blanket with people enjoying music, demonstrating the True Wireless Stereo (TWS) feature for enhanced sound.
- Flexible Connectivity Options: Supports AUX, TF Card, and USB Audio inputs.

Image: A close-up view of the speaker's input panel, clearly showing the AUX, TF (Micro SD Card), USB, and DC 5V charging ports, highlighting its versatile connectivity.
- Long Playtime: Extended battery life for prolonged listening sessions.

Image: The Monster Shock Pro speaker on a wooden table, with a split background showing a daytime scene on the left and a nighttime scene on the right, symbolizing its long playtime capability.
- Portable and Convenient Design: Lightweight with a durable strap for easy carrying.

Image: A person hiking in a snowy mountain landscape, wearing the Monster Shock Pro speaker across their body with its strap, demonstrating its portable design for outdoor activities.
What's in the Box?
Upon opening the package, please ensure all the following items are present and in good condition:
- Monster Shock Pro Bluetooth Speaker x1
- USB-C Charging Cable x1
- AUX IN Cable x1
- Strap x1
- Quick Start Guide & Warning Card x1

Image: An overhead view of the Monster Shock Pro speaker, its retail box, USB-C charging cable, AUX cable, and carrying strap laid out, illustrating the "What's in the Box" contents.
Setup Guide
1. Charging the Speaker
Before first use, fully charge the speaker. Connect the provided USB-C charging cable to the speaker's DC 5V port and the other end to a USB power adapter (not included) or a computer's USB port. The charging indicator light will show the charging status.
- Charging Indicator Light: Refer to the control panel diagram for its location.
2. Attaching the Strap
Attach the included strap to the designated loops on the speaker for convenient portability.
Operating Instructions
Control Panel Overview

Image: A detailed diagram of the Monster Shock Pro speaker's top control panel and side input ports, with numbered labels indicating the function of each button and port.
- Power On/Off: Long Press to Power On/Off; Short Press for Voice Assistant.
- Charging Indicator Light: Indicates charging status.
- Previous Song/Volume Down: Long Press for Previous Song; Short Press for Volume Down.
- Play/Pause: Long Press to Disconnect Bluetooth; Short Press to Play/Pause; Double Click to Hang Up when calling; Short Press to Answer when calling.
- Next Song/Volume Up: Long Press for Next Song; Short Press for Volume Up.
- Mode Switch: Cycles through input modes (Bluetooth, AUX, TF Card, USB Audio).
- MIC: Built-in microphone for hands-free calling.
- Equaliser: Cycles through EQ modes (Indoors, Outdoors, Deep Bass).
- AUX Input: For external audio devices using audio cables.
- Micro SD Card Input (TF): Connect a Micro SD Card storage device.
- USB (Audio) Input: Connect a USB storage device.
- USB-C Charging: Power input port.
Bluetooth Pairing
- Power on the speaker by long pressing the Power On/Off button. The speaker will enter Bluetooth pairing mode automatically.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for "Monster Shock Pro".
- Select "Monster Shock Pro" from the list of available devices to connect. A confirmation sound will indicate successful pairing.
- Once paired, the speaker will automatically connect to the last paired device when powered on, if the device is within range.

Image: A hand holding a smartphone displaying a successful Bluetooth connection to "Monster Shock Pro", with the speaker visible in the background.
True Wireless Stereo (TWS) Pairing
To achieve a stereo sound experience, you can pair two Monster Shock Pro speakers together:
- Ensure both speakers are powered on and not connected to any Bluetooth device.
- On one speaker (this will be the primary speaker), short press the "Mode Switch" button until it enters TWS pairing mode (indicated by a specific light or sound).
- The two speakers will automatically search for and pair with each other. A confirmation sound will indicate successful TWS pairing.
- Once paired, connect your device to the primary speaker via Bluetooth as described in the "Bluetooth Pairing" section. Both speakers will now play audio in stereo.
Using EQ Modes
Short press the "Equaliser" button to cycle through the three available EQ modes:
- Indoors: Optimized for balanced sound within enclosed spaces.
- Outdoors: Enhanced volume and clarity for open-air environments.
- Deep Bass: Boosts low frequencies for a more impactful bass experience.
Using Other Audio Inputs (AUX, TF Card, USB Audio)
The speaker supports multiple audio sources:
- AUX Input: Connect an external audio device (e.g., MP3 player, computer) using the provided 3.5mm AUX cable to the AUX port. The speaker will automatically switch to AUX mode.
- TF Card Input: Insert a Micro SD (TF) card with audio files into the TF Card slot. The speaker will automatically switch to TF Card mode and begin playing.
- USB Audio Input: Insert a USB storage device with audio files into the USB port. The speaker will automatically switch to USB Audio mode and begin playing.
Hands-Free Calling
When connected via Bluetooth to a smartphone, the speaker can be used for hands-free calls:
- Answer Call: Short press the Play/Pause button.
- End Call: Double click the Play/Pause button.
- Reject Call: Long press the Play/Pause button.
- Voice Assistant: Short press the Power On/Off button to activate your device's voice assistant (e.g., Siri, Google Assistant).

Image: A split image showing a woman on the left talking on a phone, and a man on the right interacting with the Monster Shock Pro speaker, illustrating its hands-free calling capability.
Maintenance
Proper care and maintenance will extend the life of your Monster Shock Pro speaker:
- Cleaning: Use a soft, dry cloth to clean the speaker's surface. Do not use abrasive cleaners, alcohol, or chemical solvents.
- Storage: Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To preserve battery life, fully charge the speaker at least once every three months if not in regular use. Avoid fully discharging the battery frequently.
- Water Resistance: The speaker is designed to be waterproof (refer to specifications for rating). However, avoid submerging it for extended periods or exposing it to high-pressure water jets. Ensure all port covers are securely closed before exposure to water.
Troubleshooting
If you encounter any issues with your speaker, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Low battery; Power button not pressed correctly. | Charge the speaker fully. Long press the Power On/Off button. |
| Cannot pair via Bluetooth. | Speaker not in pairing mode; Device Bluetooth off; Speaker too far from device; Interference. | Ensure speaker is in pairing mode. Turn Bluetooth on your device. Move speaker closer to device. Avoid strong electromagnetic interference. Try forgetting the device on your phone and re-pairing. |
| No sound or low volume. | Volume too low on speaker or device; Incorrect input mode; Audio file issue. | Increase volume on both speaker and device. Press the "Mode Switch" button to select the correct input. Test with a different audio file or source. |
| TWS pairing fails. | Speakers already connected to another device; Speakers too far apart. | Ensure both speakers are disconnected from other Bluetooth devices. Place speakers close to each other during TWS pairing. |
| Sound distortion. | Volume too high; Low battery; Poor audio source quality. | Reduce volume. Charge the speaker. Use a higher quality audio source. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | Monster Shock Pro Bluetooth Speaker S20 |
| Brand | Monster |
| Speaker Type | Built-In |
| Connectivity Technology | Wireless (Bluetooth) |
| Speaker Maximum Output Power | 100 Watts |
| Recommended Uses | Indoor/Outdoor |
| Product Dimensions | 10"D x 3"W x 5"H (28 cm x 9.6 cm x 11.6 cm)![]() Image: A technical drawing of the Monster Shock Pro speaker with its length (11.02 inch / 28 cm), width (3.77 inch / 9.6 cm), and height (4.57 inch / 11.6 cm) clearly labeled. |
| Item Weight | 4.27 pounds |
| Batteries | 1 A battery required (included) |
| Special Feature | Multi Room Audio (TWS), EQ Settings, Hands-Free Calling, Portable Design |
| Input Options | AUX, TF Card, USB Audio |
Warranty and Support
For warranty information and customer support, please refer to the Quick Start Guide included in your product packaging or visit the official Monster website. Keep your purchase receipt as proof of purchase for warranty claims.
You can also visit the Monster Store on Amazon for additional product information and support resources.
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