Optoma BM21 User guide

BM_Series_Speaker

User Manual

Note: All the pictures in this manual are for reference
only, please refer to the actual product.

Contents

1. Important Information

2. Safety Warnings and Precautions

3. Special statement

4. Product Appearance

5. Product Usage

6. Common faults and troubleshooting

7. Key Specifications

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1. Important Information

This manual Contains the precautions and the

product usage. Please read and understand all the

instructions before using the device. The damage

caused by failure to follow the instructions is not

covered by the warranty. Please keep this manual

properly.

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2. Safety Warnings and Precautions

2.1. Be careful of electric shock or fire!

2.1.1.This device is not waterproof, please keep it

dry; if water is immersed in this product,

please shut down immediately and contact

the customer service centre according to

the prompt provided by the customer

service centre before using it again.

2.1.2.Never place this device and accessories near

the burning flames or other heat sources,

Including direct sunlight.

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2.1.3.This device should be turned off and

unplugged before lightning storms.

2.2. Be careful of short circuit or catching fire!

2.2.1.

Before connecting this device to an

electrical outlet, please make sure that the

power supply voltage matches the voltage

value printed on the back or bottom of the

product. Never connect the product to an

electrical outlet when the voltage is

different.

2.3. Be careful of injury or harm this speaker!

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2.3.1.Never place this device or any objects on a

power cord or other electronic devices.

2.3.2.If this product is transported at a temperature

below 5℃, please unpack the product and

wait until the temperature reaches room

temperature before connecting it to a

power outlet.

2.3.3.This product comes with sharp objects,

please handle it carefully so as to avoid

injury to the user or scratching the

appearance of the product or damaging the

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internal parts of the product!

2.4. Be careful overheat!

2.4.1.Never install this device in an enclosed space.

Always leave at least 4 inches space

around the product for ventilation.

2.5. Children's health

2.5.1.This device and accessories may contain

some small parts, please keep them out of

the reach of children to avoid danger.

2.6. Care for the environment!

2.6.1.This device applies recyclable

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high-performance materials and

components.

2.6.2.Never dispose of this product with other

household wastes. Please understand the

local regulations on the sorting collection of

electronic, electrical products and batteries.

2.6.3.

Proper disposal of these products helps to

avoid potential negative effects on the

environment and human body health.

2.7. Care for the product!

2.7.1.Clean this device only with a piece of

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microfiber cleaning cloth.

2.8. Maintenance & servicing

2.8.1.Please contact professional service

personnel for all repair services;

2.8.2.Please do not insert any sharp object into the

inside of the device;

2.8.3.Please do not drop or hit the device to avoid

damaging it.

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3. FCC Statement

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.

Changes or modifications not expressly

approved by the party responsible for

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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

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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.

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-- 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 symbol, affixed to the product or its

packaging, indicates that the product must not

be processed with househlod waste. It must

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be brought to an electric and electronic waste

collection point for recycling and disposal. By

the appropriate disposal of this product you also

help in preventing potentially negative

consequences for the environment and human

health. The recycling of materials helps

preserve our natural resources. For further

information regarding the recycling of this

product, please contact your municipality, local

waste disposal centre or the store where the

product was purchased.

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4. Special statement

4.1. Intellectual property statement: the hardware

design and software programs of this product

are copyright protected. Anyone copying the

contents of this product and instructions

without the authorization of this company will

bear the corresponding legal responsibilities.

4.2. This manual is for reference only. The actual

final functions are subject to the actual

ordering of the customer and the actual

functions of the product received.

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4.3. The pictures are for reference only, please

refer to the actual product. The company

reserves the right to make improvements on

and changes to the product appearance and

design without prior notice.

Bluetooth words and trademarks are owned by

Bluetooth SIG, Inc.

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5. Product Appearance

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a. Type-C port

b. 4-section 3.5 mm audio input/output hole

c. Volume down Button

d. Bluetooth Button

e. Microphone mute Button

f. Answer/hang up Button

g. Volume up Button

h. Power Button

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6. Product Usage

6.1. Turn on/off the device

Long press and hold the power key for 2 seconds

to turn on or off the device.

6.2. Bluetooth

6.2.1.When Bluetooth is not connected, long press

to turn Bluetooth on/off;

6.2.2.When Bluetooth is connected, long press to

disconnect the current Bluetooth

connection.

6.3. Four types of connection modes

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6.3.1.Mode 1: Connect the computer/conference

plat (Windows or Mac) to this device via

USB cable.

6.3.2.Mode 2: Connect this device with the original

AUX audio cable (4 sections).

6.3.3.Mode 3: Connect this device with Bluetooth.

The Bluetooth indicator will flash to indicate

that the device is in Bluetooth pairing state.

Enable Bluetooth functions on mobile

phones/other devices, and select to

connect this device from the Bluetooth

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device list. Please refer to the nameplate at

the bottom of the device for the name of

bluetooth (when the conference panel is

connected to the wireless omnidirectional

mic speaker, USB bluetooth adapter is

required to ensure the stability of bluetooth

connection)

6.3.4.Mode 4:USB Bluetooth audio adapter

(supporting win7/8/10 and Mac OS)，

operating as follows:

1

Insert the USB Bluetooth audio adapter

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into the comp uter, and turn on the device

to enter the Bluetooth pairing status (If

you use a USB Bluetooth adapter to

connect to the conference plat, please

connect it to the front-mounted USB port

of the conference plat to ensure best use

effect);

2

USB Bluetooth audio adapter will be

automatically connected to the

device(which is the only device bound by

USB Bluetooth audio adapter);

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3

If it is necessary to re-pair the USB

Bluetooth audio adapter to the new

wireless omni-directional speaker, the

distance between the USB Bluetooth

audio adapter and the wireless

omni-directional speaker should be

controlled within 3 meters. When

Bluetooth is disconnected from the

wireless omni-directional speaker, long

press and hold the Bluetooth key for 9

seconds to enter the binding mode. After

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plugging the USB Bluetooth audio

adapter, the USB Bluetooth audio

adapter will be rebound successfully

within 30 seconds.

Note: to connect computer/conference plat with

USB Bluetooth audio adapter, it is necessary to set

this device as the default playback and recording

device in the computer/conference plat sound

setting interface.

6.4. Multi-party conference

It supports multi-channel data fusion of USB,

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Bluetooth and audio ports. It can work in three

connection modes at the same time so as to

support simultaneous access of multiple parties for

the conference.

6.5. Answer/hang up call

*This device can only use the function of answering

and hanging up the phone when connecting to the

phone.

6.5.1.When there is an incoming call, press the“ ”

key to answer the call.

6.5.2.When it is in calling state, press the“ ”key to

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hang up the call.

6.5.3.When there is an incoming call, long press

and hold the“ ”key for 3 seconds to reject

the call.

6.6. Mute microphone

When the device is connected to Bluetooth or

plugged into a AUX audio cord or USB cord,

short press the microphone mute key to turn the

microphone on or off.

6.7. Volume adjustment

Press volume "+" and volume "-" keys to

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increase or decrease the volume accordingly.

6.8. Bluetooth status/Settings

StatusIndicato

r status

S1 Blue

lights

flashing

State

descripti

on

Waiting

for

bluetooth

connecti

on

This state is

actionable

Long press the

bluetooth button

3s to enter S4;

Long press the

bluetooth button

9s to enter S3

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S2 Blue

light is

always

on

S3 White

lights

flashing

S4 White

light is

Bluetoot

h

connecte

d

Repair

status

with USB

bluetooth

adapter

BluetoothLong press the

Long press the

bluetooth button

3s to enter S1

Long press the

bluetooth button

3s to enter S1

bluetooth button

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alwaysonfunction

turned off

6.9. Charging the Device

6.9.1.Connect the original power adapter(5V/2A)

with USB cable for charging.

6.9.2.Use the selected wireless charger to charge

the device (this device has the wireless

charging function. In order to ensure the

charging quality and charging safety, it is

suggested that you purchase this

wireless charger via proper channel).

3s to enter S1

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6.9.3.When charging, the white indicator of the

power key will flash; when fully charged, the

green indicator of the power key will be

normally on.

6.10. Checking the battery

In the power-on state, short press the power key to

view the current remaining electric quantity.

When the light bar displays 5 squares, the battery is

full. When the electric quantity is relatively low, the

power key’s red indicator light will flash and the low

electric quantity prompt tone is broadcast.

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7. Common faults and troubleshooting

The following table contains common faults and

their solutions. Please read it carefully.

Fault Possible

Cause

Unable to

turn on the

device

Shut down

automaticall

y after

Low or no

electricity

Insufficient

electric

quantity

Solution

Connect the

adapter to

charge

Connect the

adapter to

charge

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running for

a while

No sound Is the

connection

correct? Is the

volume turned

on?

Select the

correct sound

source input;

adjust the

device

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Unable to

work with

USB

Unable to

work with

AUX

Is there any

mistake in

using the USB

cable?

Is there any

mistake in

using the AUX

cable?

Please use the

original USB

cable to make a

call.

Please use the

original AUX

cable (4

sections)

to make a call.

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Invalid key The key may

be accidentally

touched.

Unable to

charge the

device

The charging

device is in

fault or the

battery is

already full.

Long press

and hold the

power button

for 8seconds to

reset the

system.

Replace it with

a charging

device with

normal

functions

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8. Key Specifications

Frequency band(s)::2402-2480MHz(BT)

Maximum power transmitted: 13dBm