IMLONG Electronic 557B User Manual


Press and hold the "power" button on the top of the unit for 3 seconds to turn on the unit.

The item should come with enough power be powered on. If you are having trouble on pairing or powering-on it,
please make sure it is fully charged.

Use the USB charge cable connecting to the item from its type-C charging socket to your computer or charger. The
charging input power is 5V 500mA.

The red light will turn off when power charging completes.

Short press the "M" button to change LED light mode,long press to turn on or off the LED light.
Music Playing:
Bluetooth Mode:
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Once power on, the item turns default into Bluetooth mode, while there is no other connection.
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The item will automatically connect to the last Bluetooth device first. If not found, it will search a new one.
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On the Bluetooth device, switch on Bluetooth setting and search for "557B". For the first-time connection, select
"557B" to start connection. If necessary, enter the pass code 0000 or 1234.

To disconnect the item from current Bluetooth device, switch off Bluetooth from current connected Bluetooth device.

Once connected, you can listen to music from the unit wirelessly (< 33 ft.). The music streaming may be interrupted by
obstacles between the device and the item, such as walls, metallic casing that covers the device, or other devices
nearby that operate in the same frequency.

Press " power " button one time to play or pause the music; short press "< " or " > " button to skip songs; press and
hold "< " or " > " to fast backward or fast forward the music.
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Short press "EQ" button to change music mode in sequence-normal/pop/rock/jazz/classic/country
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Rotate the "VOLUME" button to adjust the music playing volume;
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Rotate the "MIC VOL" button to adjust the volume of wired microphone (not included)
TWS Mode:

Turn on 2pcs units and ensure they are in Bluetooth mode.

Press and hold the "M" button on one of the unit, waiting for their connection/ disconnection with each other.

Once the 2pcs units connected, follow the above step the connect it with your Bluetooth enable devices.
Aux-in Input Mode:

Once power on, connect the item with audio device by 3.5mm aux-in cable(not included), the unit will turn into Aux
input mode and play music automatically; press "power" button one time to enter silent mode.

Rotate the "VOLUME" button to adjust the music playing volume;
TF card/USB drive Mode:
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Once a TF card/USB drive is inserted, the unit will turn into music play mode and plays music automatically.

Press " power " button one time to play or pause the music; short press "< " or " > " button to skip songs; press and
hold "< " or " > " to fast backward or fast forward the music.

Rotate the "VOLUME" button to adjust the music playing volume;
FM radio mode
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Once power on, press "M" button to change to "FM" mode.
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Insert USB charging cable as antenna.

Press the "power" button one time to search and lock all possible FM channels automatically. When searching finishes,
there will have no channel changing.
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Press "< " or " > " button one time to select a channel.

Rotate the "VOLUME" button to adjust the music playing volume;
557B WIRELESS SPEAKER
USER MANUAL
(Read before proceeding)