behringer BT251-BK Bluetooth Stereo Earphone Instruction Manual

June 6, 2024
Behringer

Operating instruction of SD251-BT/BT251-BK

Functions of keys

Power On: Press the center key for 3 seconds
Power Off: Press the center key for 3 seconds
Volume Up: Short press “+” key
Volume Down: Short press “-” key
Next Track: Long press the “+” key.
Previous Track: Long press “-” key
Play the Track: Press the “center” key once
Pause the Track: Press the “center” key once
Answer incoming call: Press the “center” key once
Refuse incoming calls: Press the “center” key twice
End the call: Press the “center” key once
Last number Redial: Press the “center” key twice
Activate Siri: Press the “center” key thrice
MIC: Microphone
USB: micro USB charging port

Charging

The Bluetooth headset has a built-in rechargeable battery and the battery power of a new headset is not enough; please charge for at least 1.5 hours to make the battery power enough before the first use. Hereafter, charging will take about 1 hour. While it is charging, the red light is on; while the charging is saturated, the red light will be off.

Pairing of headset and Bluetooth device

The Bluetooth headset must be paired with your mobile phone (or other Bluetooth devices) before use.

  1. When the headset is in a power-off state, please press the center key to power on, will hear the voice prompt “power on “ and ”pairing”.
  2. Search the Bluetooth device on your Bluetooth headset (please refer to the mobile phone instructions for a detailed process). When the search is finished, you will find a new device called “SD251-BT” in the device list.
  3. Select SD251-BT which will be automatically paired and connected with the mobile phone; when the pairing

connection is successful, will hear the voice prompt “connected “
Notes:
In the process of pairing, some mobile phone requires inputting a pairing password, please input “0000”;
The headset will automatically shut down if it cannot find the paired device in 3-5 minutes;
If the Bluetooth headset is not in the pairing state, your mobile phone or other Bluetooth devices will not be able to search for the headset, please set the headset to the pairing state and then use the mobile phone to search again.

Bluetooth wireless call

When the Bluetooth headset is paired and connected with your mobile phone, you can use the headset to answer the phone or listen to the stereo music played mobile phone.

(1) Dial-out, answer, and hang up on calls by mobile phone
Outgoing calls

  1. Dial-out by mobile phone: Use your mobile phone to dial according to the way as usual, after dialing out, the headset will make a ringing tone, and the voice will be automatically switched to the Bluetooth headset after putting through. (Some smartphones need to have a choice.)
  2. Last number redial: Double-click the center key to dial out the last dialing phone number.

Answering and hanging up calls
When a call comes in, you will hear a phone prompt sent by the headset.

  1. When the phone rings, press the center key once or press the phone answer key to answer the phone.
  2. When the phone rings, press the center key twice to refuse the phone.
  3. If you are in a call, long press “ + “to increase the headset volume, and long press” – “to decrease the headset volume.
  4. Short press the center key, phone hang-up key or hang up by the other end to end the call, if the mobile phone is connected with playing stereo music, the phone will continue to play the music after ending the call.

Wireless stereo music playing

The paired mobile phone shall support Bluetooth A2DP.

  1. When the music is played, long press “-“ to make the music jump to the previous song..
  2. When the music is played, long press “+” to make the music jump to the next song.
  3. When the music is played, press the center key to stop the music, and then press the center to continue playing the music.
  4. When the music is played, long press “+” to increase the headset volume, and long press “-“ to decrease the headset volume.
  5. During the stereo playing, if there is a dial-up or call, the stereo playing will be automatically suspended, and the stereo music will continue to be played at the end of the phone.

 Low voltage automatic detection and power off

When the machine voltage is less than 3.3V, the red light will flash, will hear the battery low voice prompt.
When the voltage is less than 3V, the headset will automatically power off. Please recharge in time.

Battery power indication:

Paired IPHONE mobile, it will have headset battery power indication.

Packing list :

  1. SD251-BT Earphone headset 1pcs
  2. USB charge cable 1pcs
  3. Proudct user manual 1pcs

Product specification and parameters:

Product name Bluetooth stereo earphone
Product model SD251-BT/BT251-BK
Version Bluetooth V5.0 (QCC3005)
Frequency range 2.402GHZ~2.480GHZ ISM Band
Wireless transmission standard CLASS 2
Channel 79channels of 1Mhz BW
Connection type Point-to-point
Transmitting range <=10M (free space)
Frequency response 20HZ-20KHZ
Signal to Noise Ratio >82db
Audio power output 2X3mW
Status indication Red and blue bi-color indicator light
Applicable pairing product USB    Bluetooth   adapter,   Bluetooth   mobile

phone, IPAD, MID, etc  in accordance with HFP, HSP,

A2DP, AVRCP Bluetooth protocols

Support decoder| APTX/AAC/SBC
Battery| Polymer lithium-ion battery 3.7V   110mAH
Charging time| 1 hour
Charging power supply| Computer USB 5V; Charger of output DC 5V 500mA
Operating time| About 4.5 hours ( Battery saturation state)
Standby time| More than 150 hours ( Battery saturation state)
Product size|
|
|

To prevent possible hearing damage, do not listen at high volume levels for long periods.

A warning that batteries (battery pack or batteries installed) shall not be exposed to excessive heat Such as sunshine, fire, or the like.
CAUTION
Danger of explosion if the battery is incorrectly replaced
Replace only with the same or equivalent type.
FCC Statement
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 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.
  • 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.

FCC Radiation Exposure Statement
This device complies with FCC radiation exposure limits set forth for an uncontrolled environment and it also complies with Part 15 of the FCC RF Rules. This equipment must not be co-located or operating in conjunction with any other antenna or transmitter. End-users and installers must be provided with antenna installation instructions and consider removing the no- collocation 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.

Caution!
Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

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