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Letscom ST-BE30 User Manual

Made by: Letscom
Type: User Manual
Category: Headphone
Pages: 16
Size: 2.66 MB

 

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Wireless Earbuds

ST-BE30

User Manual

Thank you for purchasing our products. This manual addresses the 

safety guidelines, warranty and operating instructions. Please review 

this manual thoroughly before operating your device.

SM-LC-EJ-ST-BE30-V2


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Rotate the jet black cover of the 

charging case to open/close.

- 1 -

 Wireless earbuds × 1 pair (left and right)

 Charging case × 1

 Eartips × 3 pairs (large, medium, small)

 USB-C charging cable × 1

 User manual × 1

At a Glance

Charging Case

MFB button 

(multi-function button)

LED indicator

Microphone

USB-C charging port

Package Contents

Left Earbud 

(Main Earbud)

Right Earbud 

Replaceable eartips

Charging contacts

L

R

LED indicator


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● Power on: LED indicators flash blue 5 times
● Power off: LED indicators stay red for 2 seconds and go off
● Pairing mode (using both earbuds): LED indicator on the left earbud 

flashes red and blue alternately

● Pairing mode (using only one earbud): LED indicator on the earbud 

flashes red and blue alternately

● Connected to a Bluetooth device: LED indicators flash blue once 

every 6 seconds

● Disconnected: LED indicator on the left earbud flashes red and blue 

alternately

● Earbuds are being charged: LED indicators stay red
● Earbuds are fully charged: LED indicators turn blue and are off in 1 

minute

● Low battery: LED indicators flash red twice and blue once every 4 

seconds and a voice reminder prompts

Charging case is being charged

● 1-25% battery: the 4 indicators flash alternatively
● 25%-50% battery: the leftmost indicator stays on, and the rest 3 

indicators flash alternatively

● 50%-75% battery: the left 2 indicators stay on, and the right 2 

indicators flash alternatively

● 75%-100% battery: the left 3 indicators stay on, and the rightmost 

indicator flashes

● Fully charged: the 4 indicators stay on

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Earbud LED Indicator Guide

Charging Case LED Indicator Guide

 (with earbuds in the case)


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Charging case is not being charged

● 1-25% battery: the leftmost indicator stays on
● 25%-50% battery: the left 2 indicators stay on
● 50%-75% battery: the left 3 indicators stay on
● 75%-100% battery: the 4 indicators stay on
● Low battery: the leftmost indicator flashes

Note

Indicators will be off in 1 minute.

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Insert the earbud into your ear and rotate to fit comfortably. Ensure the 

microphone is pointing towards your mouth.

Wearing the Earbuds


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When you use the earbuds for the first time, remove the insulating 

films on the charging contacts of the earbuds.

● 

Charge the earbuds 

1) Align the charging contacts on the right earbud with the charging 

pins on the right side of the case.

2) Repeat step 1 and to charge the left earbud.

3) When the earbuds LED indicators stay red, close the case.

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Using the Earbuds


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● 

Charge the charging case

1) Plug the small end of the USB-C cable into the USB-C port of the 

charging case.

2) Plug the other end into a USB wall charger or computer (DC 5V) 

that is powered on.

Notes:

● It takes approx. 1 hour to fully recharge the earbuds.
● The earbuds and the charging case charge simultaneously. The 

charging case can be used as a standalone charger.

● When the charging case is out of power, you put the earbuds back 

into the case and close the case, the earbuds will not turn off 

automatically. Turn off the earbuds manually.

● When the charging case is out of power, the earbuds will not turn on 

automatically the time you take them out. Turn on the earbuds 

manually.

● 

Power on/off

Power on

● The earbuds are automatically on when you take them out of the 

charging case.

● Press and hold the MFB buttons on both earbuds for 4 seconds 

to turn on.

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Note

  When you use the earbuds for the first time, remove the 

insulating films on the charging contacts of the earbuds, and turn 

on the earbuds by pressing and holding the MFB buttons on both 

earbuds for 4 seconds.

Power off

 ● The earbuds are automatically off when you put them back into 

the charging case.

 

● Press and hold the MFB buttons for 6 seconds to turn them off 

(when both earbuds are paired with your phone, press and hold 

the MFB button on either left or right earbud, the other earbud 

will be off at the same time).

    Note

  When the earbuds are being charged in the charging case and 

the charging case is out of power, the earbuds will turn on 

automatically. If the Bluetooth of your Bluetooth device 

connected to the earbuds before is on and device is within 

pairable range, earbuds will connected to your device 

automatically; if the Bluetooth of your Bluetooth device 

connected to the earbuds before is off or device is not within 

pairable range, earbuds will be off in 5 minutes.

● 

Pair

Pair both earbuds (Pair use)

1) Make sure the earbuds and your phone or other Bluetooth devices 

are next to each other (within 3 feet, no obstacles between).

2) Turn on the Bluetooth of your phone or other Bluetooth devices.
3) Turn on the earbuds (when they are in shutdown state) and the 

earbuds enter pairing mode (LED indicator on the left earbud 

flashes red and blue alternately). 

4) In the list of found Bluetooth devices in your phone or other 

Bluetooth devices, choose "ST-BE30-L" to pair.

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- 7-

5) Enter "0000" if your phone or Bluetooth device asks you to enter a 

code to pair.

ST-BE30-L

100%

9:41 AM

ST-BE30-L

Notes:

● The earbuds will directly enter pairing mode the first time you turn 

them on.

● The earbuds will connect to the last paired Bluetooth device 

automatically when they are turned on. Please turn on the Bluetooth 

of your Bluetooth device before turning on the earbuds.

● If pairing failed, turn off the earbuds first and then press and hold the 

MFB button of the left earbud until the indicator on the left earbud 

flashes red and blue alternately and earbud enters pairing mode. 

Choose "ST-BE30-L" in your phone to pair and turn on the right 

earbud.

● When both earbuds are connected to your phone, if you put the right 

earbud back to the charging case, you can use the left earbud alone 

without interruption; but if you put the left earbud back to the 

charging case, the right earbud is also disconnected to your phone 

and you have to pair the right earbud with your phone again to use 

the right earbud alone.


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● When the earbuds are on but not paired with your phone or other 

Bluetooth devices, they will exit the pairing mode and be 

automatically off in 5 minutes.

Pair ONE earbud (Mono Use)

You can use both earbuds simultaneously or use either of the two 

earbuds alone.
1) Make sure the earbud and your phone or other Bluetooth devices 

are next to each other (within 3 feet, no obstacles between).

2) Turn on the Bluetooth of your phone or other Bluetooth devices.
3) Take the earbud out of the charging case.

4) Turn off the earbud by pressing and holding the MFB button for 6 

seconds.

5) Press and hold the MFB button on the earbud until the indicator 

flashes red and blue alternately and earbud enters pairing mode.

6) In the list of found Bluetooth devices in your phone or other 

Bluetooth devices, choose "ST-BE30-L" if you use the left earbud or 

"ST-BE30-R" if you use the right earbud to pair.

Note:

When the left/right earbud is connected to your phone and you take 

the other earbud out of the charging case, earbuds will pair with each 

other and then link back to your phone automatically (in the condition 

that you have paired both earbuds with your phone before) .

● 

Play/pause playing songs

Press the MFB button to pause and press the MFB button again to 

resume playing songs.

● 

Last/Next song

Press and hold the MFB button on the left/right earbud for 3 

seconds until you hear a "Do" sound to skip to the last/next song.

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● 

Volume

Press the MFB button on the left/right earbud twice to 

decrease/increase the volume.

● 

Answer/hang up/reject calls

● Press the MFB button or operate on your phone to answer an 

incoming call.

● Press the MFB button or operate on your phone to hang up an 

ongoing call.

● Press and hold the MFB button for 3 seconds to reject an 

incoming call.

Note:

To make/answer calls using ST-BE30 erabuds, choose "ST-BE30-L" 

as "Audio" route on your phone when you are making/answering 

calls.

● 

Reset the earbuds/clear all pairing information on the 

earbuds

Turn off the earbuds and press and hold the MFB buttons for 14 

seconds until the indicators on earbuds flash red and blue 

alternatively and then go off.

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Q: What should I do if the pairing failed?

A: 1). Put the earbuds back to the charging case and make sure that they 

are off. 

    2). Take the earbuds out of the case and they are automatically on.
    3). Wait that the indicator on the left earbud flashes red and blue 

alternately and earbuds enter pairing mode. 

    4). Choose "

ST-BE30-L" in your phone to pair.  

    If the pairing still fails, check the following points:
    ● Make sure the earbuds and your Bluetooth device are next to each 

other or within 3 feet and there are no obstacles between.

    ● There are no signal interference nearby (check the "Connection is not 

stable" part for signal interference conditions).

    ● Try to reboot your Bluetooth device.

Q: Earbuds are connected to phone A. What should I do if I want to 

pair earbuds with phone B when I am not able to disconnect 

earbuds from phone A?

A:

 1) Turn off the earbuds by pressing and holding the MFB buttons for 6 

seconds.

     2) Press and hold the MFB button of the left earbud until the indicator 

on the left earbud flashes red and blue alternately and earbud enters 

pairing mode.

     3) Choose "ST-BE30-L" in phone B to pair and turn on the right earbud.

Q: Why isn’t the sound clear/consistent sometimes?

A: Connection is not stable.

     Bluetooth signal is transmitted wirelessly and signals can be affected, 

which results in intermittent sound of earbuds, in the following 

conditions: 

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Trouble Shooting


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     ● The distance between the earbuds and your Bluetooth device is at 

the edge of the Bluetooth pairable distance.

     ● Transmitted signals encounter obstacles or human body blockage.
     ● There are high-power electronic devices nearby.
     ● There are other Bluetooth devices and are being turned on/off nearby.

     To resume stable connection between the earbuds and your Bluetooth 

device, try to avoid the above conditions and do the pairing again 

following the steps in the pairing failed part.

Q: Is there a latency when I am watching a video from laptop or cell 

phone?

A: 1) Video latency depends not only on the earbuds, but also the cell 

phones and the apps. 

      

2) Due to the Bluetooth 5.0 and high sensitivity antenna, the latency is 

hardly noticed on iOS devices, such as iPhone and iPad series. 

      For Android and Windows devices, the latency may be noticed in a few 

apps.

Q: Why is the power running out fast?

A: The earbuds playtime varies according to volume level and audio 

content. The following conditions may cause fast power consumption:

     ● When the charging case is out of power, you put the earbuds back 

into the case and close the case, the earbuds will not turn off 

automatically. To avoid unwanted power consumption, turn off the 

earbuds manually.

     ● When the earbuds are being charged in the charging case and the 

charging case is out of power, the earbuds will turn on automatically. 

To avoid unwanted power consumption, turn off the earbuds 

manually.


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Model

Bluetooth Standard

Operating Range

Supporting Protocols

Charging Time

Talk/Playing Time

Waterproof Rate

Charging Voltage

Battery Type

Battery Capacity

ST-BE30

V5.0

33 feet/10 meters (No obstacles 

between)

A2DP/HFP/HSP/AVRCP

1 hour (earbuds); 2.5 hours (charging 

case)

about 4.5 hours (Varies according to 

volume level and audio content)

IPX5

DC 5V 

Li-polymer

 42mAh (each earbud); 600mAh 

(charging case)

- 12 -

Specifications


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SAFETY AND WARRANTY

Important Safety Instructions

● Use of earbuds will impair your ability to hear other sounds. Use 

caution while using your earbuds when you are engaging in any 

activity that requires your full attention.

● If you have a pacemaker or other electrical medical devices, you 

should consult your physician before using this product.

● This package contains small parts that may be hazardous to 

children and should be kept out of reach from children. This product 

is not a toy - never allow children to play with this product. Always 

store the product out of reach from children. The bags themselves or 

the many small parts they contain may cause choking if ingested.

● Never try to dismantle the product yourself, or push objects of any 

kind into the products, as this may cause short circuits which could 

result in a fire or electric shock.

● None of the components can be replaced or repaired by users. Only 

authorized dealers or service centers may open the product. If any 

parts of your product require replacement for any reason, including 

normal wear and tear or breakage, please contact us.

● Avoid exposing your product to heat and humidity to protect against 

damage to the product or injury to you.

● Keep all products, cords, and cables away from operating 

machinery.

● If the product overheats, if the product has been dropped or 

damaged, if the product has a damaged cord or plug, or if the 

product has been dropped in a liquid, discontinue use and contact 

us.

● Do NOT use in areas where there are explosive hazards.
● Do NOT submerge the earbuds in water. Do NOT expose the 

earbuds to moving water (e.g., from a faucet, etc.).

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● Do NOT wear the earbuds while showering or bathing, or when 

participating in water sports, e.g., swimming, waterskiing, surfing, 

etc.

● This product contains magnetic material. Consult your physician on 

whether this might affect your implantable medical device.

● Leaving the product in hot or cold places, such as in a closed car in 

the summer and winter conditions, will reduce the capacity and 

lifetime of the earbuds.

● Dispose of the product according to local standards and regulations.
● 

Remember: 

Always drive safely, avoid distractions and follow local 

laws!

Using the earbuds while operating a motor vehicle, motorcycle, 

watercraft or bicycle may be dangerous, and is illegal in some 

jurisdictions, just as use of the earbuds with both ears covered while 

driving is not permitted in certain jurisdictions. Check your local laws. 

Use caution while using your earbuds when you are engaging in any 

activity that requires your full attention. While engaging in any such 

activity, removing the earbuds from your ear or turning off your 

earbuds will keep you from being distracted, so as to avoid accident 

or injury. Do not take notes or read documents while driving.

● When using and charging this product, basic precautions should 

always be followed, including the following:

 

Read all the instructions before using the charging case.

 

To reduce the risk of injury, close supervision is necessary when the 

charging case is used near children.

 

Do not expose charging case to water, rain, liquids or snow.

 

Use of a power supply or charger that is not recommended or sold 

by power pack manufacturer may result in a risk of fire or injury.

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Do not use the charging case in excess of its output range.

 

Do not use a charging case that is damaged or modified. Damaged 

or modified batteries may exhibit unpredictable behavior resulting 

in fire, explosion or risk of injury.

 

Do not disassemble the charging case. Incorrect reassembly may 

result in risk of fire or injury.

 

Do not open, crush or expose a charging case to fire or excessive 

temperature. Exposure to fire or extreme temperature may cause 

explosion.

 

Have servicing performed by a qualified repair person using only 

identical replacement parts.

WARRANTY

We strive to build our products with the highest attention to detail and 

craftsmanship. However, sometimes there are occurrences of defect.
We are happy to offer 1-year hassle-free warranty to all our products 

as we continue to make amazing wireless product. Please contact us 

if you have any questions about our devices.

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