Introduction
Thank you for choosing the Yealink BH78 Bluetooth Headset. This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your headset to ensure optimal performance and a seamless user experience. Please read this manual thoroughly before using the product.
What's in the Box
Verify that all items are present in your package:
- BH78 ANC Bluetooth Headset
- BT51 Dongle
- 1.2m USB-A to USB-C Cable
- Charging Stand

Image: The Yealink BH78 headset with its key features highlighted, including CloudSoft Technology, AI Noise Cancellation, 4-mic array, Dual Busylights, and up to 38 hours of talk time.
Setup
1. Charging the Headset
Before initial use, fully charge your BH78 headset. The compact charging stand is designed to fit easily on your desk.
- Place the headset on the charging stand.
- Connect the charging stand to a power source using the provided USB-A to USB-C cable.
- A full charge takes approximately 130 minutes.
- A 5-minute fast charge provides up to 1 hour of listening time.
- The headset offers up to 38 hours of talk time and 120 hours of music time on a full charge.

Image: A woman wearing the Yealink BH78 headset while working at a desk in an office. The image highlights the 5-minute fast charge for 1 hour of listening and compatibility with over 100 platforms.
2. Pairing with Devices
The BH78 headset uses Bluetooth technology for wireless connectivity. Pairing is straightforward and supports a wide range of devices.
- Power On: Press and hold the Power button on the headset until you hear a voice prompt or see the LED indicator flash.
- Enter Pairing Mode: The headset will automatically enter pairing mode when first powered on. If already paired, you may need to manually activate pairing mode (refer to the headset's specific button combination, usually holding the Bluetooth button).
- Connect via Dongle (Recommended for PC/Laptop): Insert the BT51 Dongle into an available USB-A or USB-C port on your computer. The headset will automatically connect to the dongle.
- Connect via Bluetooth (Other Devices): On your device (laptop, desktop, tablet, telephone, smartphone, smart speaker, television, gaming console), navigate to the Bluetooth settings. Select "Yealink BH78" from the list of available devices to pair.
The headset is compatible with over 100 platforms and operating systems, ensuring seamless connectivity.
Operating the Headset
Adaptive Noise Cancellation (ANC)
The BH78 features Adaptive Hybrid ANC, which automatically fine-tunes the depth of cancellation to match your environment, blocking up to 98% of background distractions.
- Activate/Deactivate ANC: Long-press the ANC button for 1.5 seconds to toggle the ANC feature.
- Ambient Sound Mode: This mode allows you to stay aware of your surroundings with natural transparency, enabling you to hear conversations without removing your headset.

Image: A man wearing the Yealink BH78 headset while working on a laptop at an outdoor cafe, demonstrating the headset's ability to constantly adjust to surroundings for a balance of quiet and awareness. The image also shows certifications for Microsoft Teams and Zoom.
Wind Noise Suppression and Clear Calls
The headset combines a 4-mic array and an AI algorithm chip with built-in wind noise suppression to ensure your conversations are crisp and clear, even in windy environments.

Image: A man wearing the Yealink BH78 headset while working on a laptop on a train. The image emphasizes the wind noise shield and the 38-hour talk time, indicating suitability for on-the-go use.
Microphone Usage
The BH78 features a discreet boom arm with a 4-mic array for superior voice pickup. The boom arm can be flipped up neatly when not in use.
- Mute/Unmute: Flipping the boom arm up or down may automatically mute/unmute the microphone. Refer to the headset's specific controls for manual mute options.
- Adaptive EQ: The headset's adjustable EQ adapts to your environment and ears, balancing music and voice for optimal sound quality.

Image: A woman wearing the Yealink BH78 headset with the boom arm extended, engaged in a video call on a laptop. The image highlights the hidden boom arm and adaptive EQ features, ensuring balanced audio for music and voice.
Dual Busylights
The visible dual busylights on the headset indicate when you are on a call, protecting you from interruptions from all angles.
Compatibility
The Yealink BH78 is certified for Microsoft Teams Premium Open Office and compatible with over 100 platforms and operating systems, ensuring seamless collaboration.
Video: An official product video demonstrating the features and usage of the Yealink BH78 Over Ear ANC Bluetooth Headset in various professional settings, highlighting its noise cancellation and call quality.
Maintenance
Cleaning
To maintain the headset's performance and appearance, clean it regularly:
- Use a soft, dry cloth to wipe the surfaces of the headset.
- Avoid using harsh chemicals, cleaning solvents, or strong detergents.
- Do not allow moisture to enter any openings.
Ear Cup Replacement
The BH78 features breathable, replaceable leatherette ear cups for long-lasting comfort and hygiene. Consult Yealink's official support for replacement parts and instructions.

Image: A woman comfortably wearing the Yealink BH78 headset while relaxing at home. The image highlights the 'Cloud-Like Soft' design, featuring breathable, replaceable leatherette ear cushions and a 10-position adjustable headband for comfort.
Storage
When not in use, store the headset in a safe place. The user-friendly design allows the headset to fold, cutting its size in half for easy, on-the-go storage in the included carrying case.
Troubleshooting
If you encounter issues with your Yealink BH78 headset, refer to the following common solutions:
- No Power: Ensure the headset is fully charged. Connect it to the charging stand and verify the charging indicator.
- Cannot Pair: Ensure the headset is in pairing mode. Turn off and on the Bluetooth on your device. If using the BT51 dongle, ensure it is properly inserted and recognized by your computer. Try restarting both the headset and the device.
- No Sound/Poor Audio Quality: Check the volume levels on both the headset and your connected device. Ensure the headset is selected as the audio output device in your system settings. If using the dongle, ensure it is the default communication device.
- Microphone Not Working: Ensure the microphone boom arm is lowered and not muted. Check microphone settings on your connected device to ensure the BH78 is selected as the input device.
- ANC Not Effective: Ensure ANC is activated. Adjust the headset's fit to ensure a good seal around your ears.
For further assistance, please contact Yealink customer support.
Specifications
| Brand | Yealink |
| Model Number | BH78 |
| Ear Placement | Over Ear |
| Noise Control | Adaptive Active Noise Cancellation |
| Connectivity Technology | Wireless (Bluetooth) |
| Wireless Technology | Bluetooth |
| Headphone Jack | USB-C |
| Battery Average Life | 38 hours (Talk Time) |
| Battery Charge Time | 130 minutes |
| Additional Features | Noise Cancellation, Wind Noise Suppression |
| Compatible Devices | Laptops, Desktops, Tablets, Telephones, Smart Speakers, Televisions, Gaming Consoles, Cellphones |
| Material | Faux Leather (Ear Cushions) |
| GTIN / UPC | 841885127969 |
Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official Yealink website. Keep your proof of purchase for warranty claims.
Yealink Official Website: www.yealink.com