User's Manual

MS31901 USER MANUAL

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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.

Charing 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 to pairing

mode automatically.

• If Bluetooth device is connected, press and hold the MFB for about 2 seconds,

disconnect and ready to pair another device.

• If speaker does not connect any Bluetooth device, it will enter to pairing mode

automatically.

During pairing, activate Bluetooth on your phone and set it to search for new Monster device

for pairing. When the speaker is connected successfully, connected tone will be heard and the

The white LED indicator changes from a breathing effect to a steady light.

Volume Control

Short press the Volume Button “ ” or “ ” to turn volume up or down.

Music

Play/Pause: In the music playback mode, press the MFB to play/pause music.

Track forward: In the music playback mode, press and hold the Volume “ ” Button for 2

seconds for next song.

Track backward: In the music playback mode, press and hold the Volume “ ” Button for 2

seconds for 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.

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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. Charing 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.
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Data deletion / copy in SD When the speaker is off, please 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. After this device, you can delete or copy the contents of the device.
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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.