sanag B51S Pro Bone Conduction Bluetooth Headset User Guide

Operating guide
B51S Pro/B51S Pro Max

Thank you for choosing our bone conduction Bluetooth headset for a better experience Please read the instruction manual carefully before using this product. If there is any printing error or Translation errors hope that the majority of users understand

Overview of key features

1. Volume increase / Next song: short press volume increase, long press one song
2. Key on / multi-function keys: switch on / off, play pause, multi-function switching
3. Volume decrease / previous song: short press volume decrease, long press previous song
4. LED display lamp
5. MIC
6. Horn: air conduction sound generating unit

Charging use
When the earphone is under low voltage, the red light flashes once a second and there is an alarm sound. At this time, please connect the power adapter The adapter charges the headset, otherwise the headset will automatically shut down when the power of the headset is too low.
The earphone is charged through a magnetic charging wire.
After the charging is completed, the working indicator changes from red (steady on) to blue (steady on). Note: “Please use a DC 5V power adapter that meets national standards and has passed CCC certification for charging.”
Bluetooth pairing

• First boot pairing:
  In the off state, long press the multi-function button for 2 seconds, the blue light is always on for 1 second, the red/blue light alternately flashes, the headset is turned on and directly enters the pairing search mode, the power is accompanied by a prompt sound, and the mobile phone or smart electronic device is turned on, from Bluetooth In the list, find “Sanag B51S Pro / B51S Pro Max” and click Connect.

Key operation

• Headset on:
  In the off state, press and hold the multi-function button for 2 seconds, the blue light is always on for 1 second, the red/blue light flashes alternately, and the headset is turned on with a beep.

• Headset off:
  When the headset is turned on, press and hold the multi-function button for 4 seconds, the red light will be on and then it will go out, and the headset will turn off.
  Accompanied by a beep.

• Disconnection, over distance disconnection or equipment shutdown:
  When the mobile phone and headset exceed the Bluetooth connection distance, the headset appears with a prompt tone, and the mobile phone and headset are disconnected. Return to the Bluetooth connection range between the headset and the mobile phone within 3 minutes. The headset and the mobile  phone can be automatically connected. After 3 minutes, the headset enters the standby mode. If it is not connected after 5 minutes, the headset will automatically shut down.

• TF card mode or Bluetooth mode：
  When the headset is on, double-click the on key, and the blue light flashes once every 10 seconds to switch the TF card mode or Bluetooth mode, accompanied by “Music” prompt tone.

• volume up
  When the headset is on a call, short press the volume up key to continuously increase the volume to the maximum, accompanied by a prompt tone.

• volume down
  When the headset is talking, press the volume reduction button and the volume continues to decrease (the minimum tone), accompanied by a beep tone.

• Music play / pause:
  Short press the multi-function button, music play/pause, play status: blue light flashes once in 5 seconds Pause status: blue light flashes once in 10 seconds.

• Single loop/full loop:
  Under the state of music, three strikes open key, single cycle prompt “du” a short note, all cycle Prompt “beep” two times.

• Answer / reject:
  The first call comes in, short press the multi-function button to answer it; long press the multi-function button to reject it.

• Hang up during a call
  Short press the multi-function button to hang up.

• Next song button/volume up
  In the music state, short press the volume up button and the volume continues to increase. When it reaches the maximum, there will be a beep.Playing status, long press to switch to the next song.

• Previous song button/volume down
  In the music state, short press the volume down button and the volume will continue to decrease. When it reaches the minimum, there will be a beep.
  Playing status, long press to switch to the previous song.

• How to copy data
  In any state, insert the data cable into the PC or mobile phone (with OTG adapter) to read the USB flash disk, and copy the required songs or data files to the device.

• Low voltage alarm/shutdown
  Alarm: the red light flashes once every second, accompanied by the alarm sound “Please charge”.
  Power off: When the red light is on for 3 seconds, the headset is turned off.

Matters needing attention:

• When the phone is turned on without connecting to any mobile phone, it will automatically turn off after 5 minutes.
•  Please fully charge the product for the first use.
• Please do not dismantle or repair or modify this product for any reason, otherwise it may cause fire and electronic breakdown.To completely damage the product.
• If the charging is completed, please disconnect the charger from the device, Do not exceed 12 hours.
• Please do not throw old batteries in old household garbage for disposal. Improper disposal of batteries may cause damage.If the battery catches fire or explodes, please follow local regulations to dispose of this product, battery and other accessories.
• The battery is not allowed to be disassembled, hit, squeezed or thrown into fire. If it is severely swollen, please do not continue to use it.The battery must not be exposed to excessive heat.
• Do not repair this product by yourself.
• If consumers use a power adapter to charge, they should purchase a matching power adapter that has been certified by CCC and meets the standard.

Basic parameters

• weight: bare metal 25g
• headset type: Sports Bluetooth headset
• Bluetooth version: V 5.3
• charging input: DC 5V — 120mAh
• transmission distance: 10M
• product impedance: 16 ± 10%
• earphone size (length, width and height): 13810641mm
• charging time: about 1.5 hours (it is better to charge more than 2 hours for the first time)
• operating temperature: -20 ℃ to 70 ℃
• storage temperature: -20 ℃ to 70 ℃

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.

Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment.
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.
RF Exposure Information
The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

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