Introduction
Thank you for choosing the Monster MFS 1 Portable Bluetooth Speaker. This manual provides essential information for setting up, operating, and maintaining your speaker to ensure optimal performance and longevity. Please read it thoroughly before use.
The Monster MFS 1 is designed to deliver a powerful and clear audio experience with its unique Pure Sound technology. It features multiple connectivity options, a long-lasting battery, and a portable design, making it ideal for both indoor and outdoor use.
What's in the Box
- 1 x Bluetooth Speaker
- 1 x USB-C Charging Cable
- 1 x AUX-in Cable
- 1 x Shoulder Strap
- 1 x Quick Start Guide and Warning Letter
Product Overview
Familiarize yourself with the key components of your Monster MFS 1 speaker.

Figure 1: Front view of the Monster MFS 1 Portable Bluetooth Speaker, showcasing its black grille and red handle.

Figure 2: Close-up of the top control panel, showing the microphone volume knob, master volume knob, numeric keypad, and playback control buttons. The display shows "BLUE".

Figure 3: Rear view of the speaker, highlighting the Mic In, AUX In, USB, TF Card, and USB-C charging ports.
Setup
1. Charging the Speaker
Before first use, fully charge the speaker. Connect the provided USB-C charging cable to the USB-C port on the rear of the speaker and plug the other end into a compatible USB power adapter (not included). The charging indicator will show the charging status.

Figure 4: The speaker indicating 12 hours of playtime, symbolizing its long battery life after charging.
2. Attaching the Strap
The Monster MFS 1 comes with a removable silicone strap and an adjustable shoulder strap for easy portability. Attach the desired strap to the designated loops on the sides of the speaker.

Figure 5: Demonstrates the speaker being carried by hand and over the shoulder using the detachable straps.
Operating Instructions
1. Power On/Off
Press and hold the power button (Ⓞ) on the top panel to turn the speaker on or off.
2. Bluetooth Pairing
- Turn on the Monster MFS 1 speaker. The display will show "BLUE" and the speaker will enter pairing mode.
- Enable Bluetooth on your device (smartphone, tablet, etc.).
- Select "Monster MFS1" from the list of available Bluetooth devices.
- Once connected, the speaker will indicate successful pairing.

Figure 6: A smartphone screen displaying the Bluetooth settings, with "Monster MFS1" listed as a discoverable and connected device.
3. Multiple Playback Methods
The speaker supports various audio sources:
- AUX Input: Connect an external audio device using the provided AUX-in cable to the "AUX IN" port.
- TF Card: Insert a TF (microSD) card into the "TF CARD" slot to play music directly.
- USB Drive: Insert a USB flash drive into the "USB" port to play music files.
- FM Radio: Switch to FM radio mode to listen to local stations.
- Microphone Input: Connect a microphone to the "MIC IN" port for karaoke or public speaking.

Figure 7: Close-up of the rear panel showing the various input ports: Mic In, AUX In, USB, TF Card, and USB-C.
4. Adjusting Volume and Playback
Use the dedicated knobs on the top panel to adjust the master volume and microphone volume independently. The numeric keypad and playback buttons allow for song selection and control when using TF card or USB drive modes.

Figure 8: The top control panel with knobs for volume adjustment and buttons for track control and numeric input.
5. Indoor/Outdoor Dual-Mode
The speaker features an indoor/outdoor mode to optimize sound for different environments. Refer to the quick start guide for specific instructions on switching between these modes.

Figure 9: Visual representation of the speaker being used in both an indoor living room setting and an outdoor park setting, highlighting its versatility.
Maintenance
- Keep the speaker dry and clean. Avoid exposure to extreme temperatures.
- Clean the surface with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Store the speaker in a cool, dry place when not in use for extended periods.
- Ensure all ports are free of dust and debris.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not turn on. | Low battery. | Charge the speaker fully using the provided USB-C cable. |
| Cannot pair via Bluetooth. | Speaker is not in pairing mode; device Bluetooth is off; too far from speaker. | Ensure speaker is in pairing mode ("BLUE" displayed). Turn on Bluetooth on your device. Move device closer to speaker (within 33 feet/10 meters). |
| No sound. | Volume too low; incorrect input mode; device not playing. | Increase speaker and device volume. Ensure correct input mode (Bluetooth, AUX, TF, USB). Check if the connected device is playing audio. |
Specifications
- Brand: Monster
- Model: M170
- Output Wattage: 40 Watts
- Power Source: Battery Powered (1 Lithium Ion battery included)
- Connectivity Technology: Bluetooth, AUX
- Audio Inputs: AUX In, USB, TF Card, Mic In
- Product Dimensions: 4.92 x 3.84 x 9.61 inches
- Item Weight: 2.99 pounds
- Color: Red & Black
- UPC: 810079700936
Official Product Videos
Watch this official video from the seller for more information on the Monster MFS 1 Portable Bluetooth Speaker.
Monster Portable Bluetooth Speakers
This video provides an overview of the Monster Portable Bluetooth Speakers, showcasing their features and design.
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 for warranty claims.
Manufacturer: Monster





