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Connect the micro USB cable to the micro USB port; This cable serves as an 

antenna and improves FM reception.

Turn on the speaker, and press the MODE button until the radio function is selected.

Press the button       once to search and record the radio stations in memory.

Use the       or        buttons to change the seasons.

Press the button         to return to the previous song or

press and hold to return seconds of the song

Press the button          to return to the previous song

Press the button          to move to the next song

Press the button          to move to the next song or

hold down to advance seconds of the song

DC 5V

AUX

- VOL +

SD

ON / OFF

MODE

USB

Mini bazooka 
bluetooth speaker 

Instruction Manual

V0.0

0918A

BOC-857

CAUTIONS

• This device is not intended for use by people (including children), whose 

physical, sensory or mental abilities are different or reduced, or who lack 

experience or knowledge.

• Children should be supervised to ensure they do not use the device as a toy.

• Do not use the horn if it has been dropped or damaged in any way.

• Repairs must be carried out by qualified personnel.

  • Place the horn on a uniform surface, free of vibrations and away from 

sources of heat.

• Keep the horn out of the reach of children.

• Do not play music at excessive levels, especially near children, as hearing 

damage may occur.

Read all instructions before using this product.

"Operation of this equipment is subject to the following two conditions: (1) this 

device or device may not cause harmful interference, and (2) this device or 

device must accept any interference, including interference that may cause 

undesired operation. . "

BLUETOOTH MODE

1. Turn on the speaker.

The horn will emit a tone and the LED will remain on.

2. Activate Bluetooth on your mobile device and select: "STEREN 

BOC-857".

If the link was successful, the horn will emit a sound.

3. Start music playback from your mobile device.

BATTERY CHARGE

Fully charge the speaker battery for 4 hours before using it.
During charging the LED will light red.

Do not leave the speaker connected for more than 4 hours;
overloading it can negatively affect the time of
battery life.

DC 5V

AUX

- VOL +

SD

ON / OFF

MODE

USB

DC 5V

AUX

- VOL +

SD

ON / OFF

MODE

USB

SPECIFICATIONS

1. Input for devices with 3.5 mm connector
2. Switch on / off

 

3. USB port
4. Advance *
5. Late *
6. Micro USB charging port
7. SD Port
8. Pause / Play
9. Change Mode (Bluetooth, FM Radio, USB, SD or Auxiliary).
10. /-

1

2

4

10

RADIO FM  MODE

Press the button         to

Stop or resume the song.

To change the song, do it from 

your Smartphone.

* You can change the function depending on the mode you are in.

Input: 5V - - - 1 A (x USB)

Power output: 5 Wrms 

Speaker: 10 W, 4 ohms

Frequency response: 100 Hz -20 kHz

Sensitivity: 82dB+/-3dB 

Battery: 3.7 V - - - 1 500 mAh

SNR: >95 dB

THD: <3%

Press the button        to stop or resume the track.

Press the button          to stop or resume the song.

USB/SD MODE

1. Turn on the speaker.

2. Insert an SD or USB memory into the 

corresponding slot.

Playback will start automatically.

DC 5V

AUX

- VOL +

SD

ON / OFF

MODE

USB

3

5

6

7

8

9

AUX MODE

DC 5V

AUX

- VOL +

SD

ON / OFF

MODE

USB

Product:  Mini bazooka bluetooth speaker

Model: BOC-857                                                                                                                                                                                                                                                                                                                                                                     

Brand: Steren

WARRANTY

This Steren product is warranted under normal usage against defects in workmanship

and materials to the original purchaser for  one year on the other parts and three months in her battery

 

 from the date of purchase.

CONDITIONS

1. This warranty card with all the required information, invoice or purchase ticket,

product box or package, and product, must be presented when  warranty service is required.
2. If the product is in the warranty time, the company will repair it free of charge.

3. The repairing time will not exceed 30 natural days, from the day the claim was received.
4. Steren sell parts, components, consumables and accessories to customer,

as well as warranty service, at any of the addresses mentioned later.

 

THIS WARRANTY IS VOID IN THE NEXT CASES:

If the product has been damaged by an accident, acts of God, mishandling, leaky batteries,

failure to follow enclosed instructions, improper repair by 

unauthorized personnel, improper safe keeping, among others.
a) The consumer can also claim the warranty service in the purchase establishment.

b) If you lose the warranty card, we can reissue it, if you show the invoice or purchase ticket.

RETAILER INFORMATION

Name of the retailer ____________________________________   

 

Address _____________________________________________

Product ______________________________________________   

 

In case your product fails or have questions, please contact your nearest dealer.

 If you are in Mexico, please call to our Call Center.  

01 800 500 9000

Brand _______________________________________________

Serial number _________________________________________    

Date of delivery _______________________________________

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