MS31901 USER MANUAL
Power/Charging
For better enjoyment, you should fully charge the speaker before use. The package includes a USB Type-C charging cable (With data transmission function) that can be connected to your computer or other device made for standard USB compatible charging. Charging with 5V/2A or above power adapter (not included).
Caution: ONLY use computer USB output or standard 5 volt only power adapter for charging. Damage may occur if non-standard USB power adapter is used for charging. Do not charge if connector and/or device is wet or damaged.
Power On/Off
In power off mode, press and hold the Power On/Off Button for about 2 seconds to power on the speaker; you hear the opening tone.
To power off the speaker, press and hold the Power On/Off Button for about 2 seconds again; you will hear a shutdown tone.
Caution: If no Bluetooth device is connected, the speaker will be turned off within about 15 minutes.
Pairing
- When you unbox the speaker and power it on for the first time, it will enter pairing mode automatically.
- If a Bluetooth device is connected, press and hold the MFB for about 2 seconds to disconnect and be ready to pair another device.
- If the speaker does not connect to any Bluetooth device, it will enter pairing mode automatically.
During pairing, activate Bluetooth on your phone and set it to search for new Monster devices for pairing. When the speaker is connected successfully, a connected tone will be heard, and the white LED indicator changes from a breathing effect to a steady light.
Volume Control
Short press the Volume Button [volume-up] or [volume-down] to turn the volume up or down.
Music
Play/Pause: In music playback mode, press the MFB to play/pause music.
Track forward: In music playback mode, press and hold the Volume [volume-up] Button for 2 seconds for the next song.
Track backward: In music playback mode, press and hold the Volume [volume-down] Button for 2 seconds for the previous song.
SD Card Playback
After powering on, short press the "Power On Key" to switch to the built-in SD mode for playback. If you need to use Bluetooth playback, you can use the "Power Key" button to switch the audio source.
Data Deletion / Copy in SD
When the speaker is off, use a USB Type-C data cable. Plug one end into the speaker's charging port and the other end into the computer's USB port. Then turn on the speaker. Wait for the computer to search for "removable device name", and open "My Computer" to find it. From this device, you can delete or copy the contents.
Power Saving Setting
- In Bluetooth mode, if there is no Bluetooth connection, or no music playback or data transmission on the Bluetooth connection, the speaker will automatically turn off after 15 minutes.
- In SD card mode, if there is no music playing, the speaker will automatically turn off after 15 minutes.
Reset Paired Device List
After powering on, with no music playing, press the Volume [volume-up] and Volume [volume-down] Buttons simultaneously for about 3 seconds.
LED Indicator Guide
| Status | Description | Voice/Tone |
|---|---|---|
| Power On | Mode LED Indicator: White LED stays on about 1 second | Opening Tone |
| Power Off | Mode LED Indicator: Off white LED | "Goodbye" |
| Pairing | Mode LED Indicator: Respiration status of white LED light | "Discovering" |
| Bluetooth Connected | Mode LED Indicator: White LED is always on | "Your device is connected" |
| Bluetooth playback | Mode LED Indicator: Off white LED | - |
| SD Mode | Mode LED Indicator: Off white LED | "Play by TF Card" |
| SD card data Mode | Mode LED Indicator: White LED flashes quickly | - |
| Charging | Charging LED Indicator: Red LED lights when charging, turns off after fully charged | - |
| Battery Low | "Battery Low" |
Battery Use Caution
- Fully charge before use.
- If the battery is not properly replaced, there is an explosion risk and it can only be replaced with a battery of the same type and equivalent. It is recommended to consult the service provider; do not replace privately.
- The battery (battery pack or battery pack combination) must not be exposed to sunshine, fire, or similar overheated environments.
FCC Statement
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
