Sudio B2 Bone Conduction Headphones

User Manual

Health · comfort · Release the ears

Product Overview

The Sudio B2 Bone Conduction Headphones offer an open-ear listening experience, allowing you to enjoy music, take calls, and play games while remaining aware of your surroundings. They are designed for comfort and freedom, making them ideal for office use, outdoor activities, and driving.

Button Functions

The headset features the following controls:

1. Type-C Charging Port: For charging the device.
2. Volume Button: Used for volume adjustment and other functions.
3. Volume+/Power Button: Multifunction button for power, play/pause, and call control.
4. Microphone: For voice calls.
5. LED Indicator: Shows charging and pairing status.

Appearance and Wearing Instructions

Appearance: The headphones feature an over-ear design, with the main unit resting behind the neck and the transducers positioned on the cheekbones.

Wearing Instruction: Hang the earphones behind the neck. Position the speakers on the cheekbones, just in front of the ear, for comfortable and effective sound transmission. Do not twist or bend the rear hanger excessively, as this may damage internal components.

Control Description

Power On: Press and hold the power button for 3 seconds. The white light will be on for 3 seconds, then white and orange lights flash alternately. Earphone prompt: "on".

Power Off: Press and hold the power button for 6 seconds. The orange light flashes. Earphone prompt: "off".

Pairing Mode: After powering on, the headset enters pairing mode with white and orange lights flashing alternately. Search for "Sudio B2" on your device and connect manually. If no pairing record exists, it will prompt "ready to pair, find your Sudio product in the Bluetooth list of your device" every 10 seconds for 5 times.

Reconnecting: If a pairing record exists, the headset attempts to reconnect. The white light flashes. If connection fails within 15 seconds, it enters pairing mode, prompting "ready to pair..." every 10 seconds for 5 times. White light flashes for 15 seconds, then white/orange alternate until successful.

Successful Pairing: Earphone prompts "Connected" upon successful pairing or reconnection after disconnection.

Disconnect Bluetooth: Manually disconnecting Bluetooth returns the headset to pairing mode (white/orange lights flash alternately).

Automatic Disconnect: If Bluetooth disconnects due to distance and no music plays for 10 minutes, the headset will turn off. White light flashes quickly, prompt: "Disconnected".

Play/Pause: Click volume up/down button during music playback. Prompt: "Ding".

Volume Up: Triple-click the volume up button during music or call. Prompt: "beep".

Volume Down: Triple-click the volume down button during music or call. Prompt: "beep".

Previous Song: Double-click volume down button during music playback. Prompt: "ding ding".

Next Song: Double-click volume up button during music playback. Prompt: "ding ding".

Voice Assistant: Press and hold volume down button for 2 seconds during music playback to activate. Press and hold again or click to exit. Prompt: "humming".

Answer/Hang Up/Reject Call: Click volume up/down to answer (prompt: "humming"). Press and hold volume up/down for 2 seconds to hang up (prompt: "thumping sound"). To reject, press and hold volume up/down for 2 seconds during an incoming call until you hear "Dong Dong".

Cancel Dialing: Click volume up/down button to cancel an outgoing call. Prompt: "thumping sound".

Three-Party Call: Click volume up/down to answer. Double-click volume up/down to switch calls. Press and hold volume up/down for 2 seconds to hang up the current call and switch to the other party.

Restore Factory Settings: While powered on, press and hold volume up and volume buttons simultaneously for 5 seconds. The orange light flashes 3 times, followed by a prompt tone, indicating a successful reset.

Chargers and Batteries

Charger and Battery: Ensure your charger meets specifications: Output voltage DC5V +/- 0.25V, output current 100mA-500mA. Using higher voltage may damage the headset.

WARNING: Use only approved chargers. Other chargers may void warranty and cause damage. Do not strike the product forcefully, as this may damage internal components.

Charge the Battery: The headset has a built-in rechargeable battery. Do not attempt removal. Store in a dry, ventilated place and charge every two months if not in use.

Battery Low: Orange light flashes every 2 seconds. Prompt "Battery Low" every 4 minutes. The headset will shut down automatically after 5-10 minutes of low battery. Connect the charger.

Charging: Plug the charger into an AC outlet. The indicator light is orange while charging. If charging doesn't start, reconnect the headset. When fully charged, the orange light turns off, and the white light stays on. Disconnect the charger. Note: Actual call/standby times may vary.

Product Specifications

Music playing time: ~8 days
Standby time: ~2.5 hours
Charging time: ~2.5 hours
BT version: 5.3
Speaker impedance: 8Ω±3db
Microphone sensitivity: -42±2db
Product weight: 29g
Bluetooth connection distance: 10 meters

Important Notes

Wear correctly: Place speakers on cheekbones, not inside the ear.
Volume: Avoid prolonged loud listening; use moderate volume.
Awareness: Headphones affect environmental perception; be cautious.
Care: Avoid dropping, sitting on, or immersing in water. Keep away from fire and high voltage.
Children: Not for children under 3 (contains small parts).
Disposal: Recycle electronics properly, do not discard as household waste.
Liability: The company is not liable for losses resulting from user non-compliance with warnings.

FCC Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

This device may not cause harmful interference, and
This device must accept any interference received, including interference that may cause undesired operation.

Warning: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

NOTE: 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.

RF warning statement: The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

Certificate of Conformity

This section contains a certificate indicating the product meets required standards. Details typically include Brand, Product Name, Model, Date of Manufacture, and Inspector.

	Sudio S2 True Wireless Earbuds User Manual and Guide Comprehensive user manual for Sudio S2 true wireless earbuds, covering setup, pairing, controls, FCC compliance, and support information. Includes detailed textual descriptions of diagrams and multilingual support resources.
	Sudio T2 Wireless Earphones: Warnings, Precautions, and Usage Guide Comprehensive guide to the Sudio T2 wireless earphones, covering essential warnings, precautions for safe usage, and general handling instructions to ensure optimal performance and longevity.
	Sudio R3 Wireless Headphones Owner's Manual Owner's manual for the Sudio R3 wireless headphones, detailing setup, operation, and features.
	Sudio N3 Owner's Manual: Bluetooth Earphones User Guide Official owner's manual for the Sudio N3 Bluetooth earphones. Learn about features, FCC compliance, and basic operation of your Sudio N3 wireless earbuds.
	Sudio A3 Pro Bluetooth Earphones - User Manual and FCC Compliance Comprehensive guide for Sudio A3 Pro Bluetooth earphones, detailing FCC compliance, product features, operational diagrams, and multilingual support information.
	Sudio A1 Wireless Earbuds Owner's Manual Comprehensive owner's manual for the Sudio A1 wireless earbuds, covering setup, pairing, playback controls, call management, battery status, charging, and factory reset instructions.
	Sudio F4 Bluetooth Speaker: Warnings, Precautions, and Usage Guide Comprehensive guide to the Sudio F4 Bluetooth speaker, covering essential warnings, precautions, and usage instructions in multiple languages. Learn how to safely operate and maintain your Sudio F4.
	Sudio S2 True Wireless Earbuds Owners Manual Comprehensive owners manual for the Sudio S2 true wireless earbuds, covering setup, pairing, controls, features, and charging. Learn how to use your Sudio S2 for music, calls, and voice assistance.