Introduction
The QCY H3S are advanced over-ear headphones designed to deliver a superior audio experience. Featuring -56dB Adaptive Active Noise Cancellation, Hi-Res Audio with LDAC codec, and 360° Spatial Sound, these headphones provide breathtaking depth and dynamics. With dual driver units, up to 102 hours of battery life, Bluetooth 6.0 with dual device connection, and customizable sound via the QCY App, the H3S are built for immersive listening and clear communication.
Package Contents
Please check the box for the following items:
- QCY H3S Headphones x 1
- Type-C Charging Cable x 1
- User Manual x 1

Specifications
| Feature | Detail |
|---|---|
| Product Name | QCY H3S |
| Bluetooth Version | 6.0 |
| Compatible Systems | iOS / Android |
| Bluetooth Range | 10m |
| Water Resistance | IPX5 |
| Battery Life (ANC on) | 58 hours |
| Battery Life (ANC off) | 102 hours |
| Battery Capacity | 750mAh |
| Charging Port | Type-C |
| Material | ABS |
| Weight | 240g |
| Driver Diameter | 40mm (mid-bass), 13mm (tweeter) |
| Frequency Response | 20 - 40000Hz |
| Audio Codecs | SBC, LDAC |
| Features | Active Noise-Cancellation, Dual Connection, Voice Assistant, Sound Isolating, Volume Control, Control Button, App Support |

Setup Guide
1. Charging the Headphones
The headphones need to be fully charged prior to first-time use. Connect the included Type-C charging cable to the charging port on the headphones and plug the other end into a USB power source. The LED indicator will show charging status. A full charge provides up to 102 hours of playtime with ANC off, or 58 hours with ANC on. If the headphones are left unused for over two weeks, please recharge them to maintain battery health.

2. Powering On/Off
- Power On: Hold the Multi-function Button for 2 seconds.
- Power Off: Hold the Multi-function Button for 2 seconds.
3. Bluetooth Pairing
To pair your QCY H3S headphones with a device:
- Ensure the headphones are powered off.
- Hold the Multi-function Button until the LED indicator flashes, indicating pairing mode.
- On your device (smartphone, tablet, laptop), enable Bluetooth and search for available devices.
- Select "QCY H3S" from the list of devices.
- Once connected, the LED indicator will change, and you will hear an audio prompt.
If you encounter issues, delete any previous pairing records on your mobile phone and attempt to pair again. If headphones fail to be found, try making them connectable again or restore factory settings (refer to Troubleshooting section).
Operating Instructions
1. Button Functions
The QCY H3S headphones feature intuitive buttons for easy control:

- ANC Switch:
- Press x1: Toggle between ANC ON/OFF/Transparency Mode.
- Press x2: Activate Adaptive ANC.
- Multi-function Button:
- Hold 2s: Power ON / Power OFF / Reject Call.
- Press x1: Pause / Play / Answer / Hang up.
- Press x2: Low-latency Mode.
- Press x3: Voice Assistant.
- VOL + Button:
- Hold 1s: Play Next Track.
- Press x1: Volume Up.
- VOL - Button:
- Hold 1s: Play Previous Track.
- Press x1: Volume Down.
2. Active Noise Cancellation (ANC) Modes
The QCY H3S offers impressive -56dB noise reduction with 5 distinct noise cancellation modes:
- Adaptive ANC: Automatically adjusts noise cancellation based on your environment.
- Crowded Mode: Optimized for noisy environments like public transport.
- Commute Mode: Ideal for daily commutes, reducing engine and road noise.
- Indoor Mode: Suitable for office or home, reducing ambient chatter.
- Anti-Wind Mode: Minimizes wind noise during outdoor activities.
Use the ANC Switch button to cycle through these modes or activate Adaptive ANC.


3. Hi-Res Audio and LDAC
The H3S supports Hi-Res Audio certification and LDAC lossless transmission, providing studio-quality sound. Note that iOS devices do not support LDAC. When 360° Spatial Sound mode is active, LDAC will be temporarily turned off.

4. Dual Driver Units
The headphones feature a professional dual-driver system with a 40mm precision mid-bass driver and a 13mm dedicated tweeter, delivering powerful lows, crystal-clear highs, and smooth extension.

5. 360° Spatial Sound
Experience rich sound layers and a 3D listening experience with the hi-resolution spatial model algorithm. Remember that LDAC will be turned off when spatial sound mode is active.

6. QCY App Customization
Personalize your listening experience using the QCY App. It offers 7 EQ sound effects and tailor-made audio modes for various situations, including Gaming Mode (60ms Low Latency), Movie Mode, and Music Mode.

7. Dual Device Connection
The H3S supports simultaneous connection to two devices, allowing you to seamlessly switch between your laptop, phone, tablet, or console without missing a beat.

8. Wired Connection
In addition to Bluetooth wireless, the H3S also supports Type-C wired connections for added flexibility. Please note that the package does not include a Type-C Audio Cable.

Maintenance
- Cleaning: Gently wipe the headphones with a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
- Storage: Store the headphones in a cool, dry place away from direct sunlight and extreme temperatures.
- Charging: Always use chargers made by qualified manufacturers to prevent damage to the battery and headphones.
- Water Resistance: The headphones have an IPX5 water resistance rating, meaning they are protected against low-pressure water jets from any direction. They are not designed for submersion.
Troubleshooting
- Q: What should I do if the headphones are unable to turn on?
- A: Confirm that the over-ear headphones have power left by pressing the power button and checking if the LED light is illuminated. If the headphones are powered off, connect them with the included USB cable to a USB power source for charging.
- Q: How to solve the problem that the mobile phone prompts that it cannot connect?
- A: Delete the pairing record for the QCY H3S on your mobile phone, then search for the device again and attempt to pair.
- Q: How to solve the problem that there is no sound when listening to music or calling?
- A: On Android phones, there is a settings icon next to the Bluetooth connection name. Click it, turn off and then turn on the mobile phone audio and media audio. If there is still no sound, re-pair the headphones with your mobile phone.
- Q: Why is there a delay in video or games?
- A: Delays can occur due to factors such as the use environment, network conditions, and mobile phone codec. The H3S features a 60ms low-latency mode for gaming, which can be activated by pressing the Multi-function Button twice.
- Q: How to solve the problem of stuck or intermittent sound?
- A: Interference from Wi-Fi, 5G, 4G signals, or high-power electrical appliances nearby can cause sound issues. Try changing your environment or re-pairing the headphones to resolve the problem.
- Q: The headphones can't connect to the QCY App?
- A: Try setting the language of the application to English before attempting to connect the headphones.
- Q: How do I update the firmware of my headphones?
- A: In the QCY App, navigate to Device > Settings > Firmware Upgrade. If it indicates that an upgrade cannot be made, your headphones are already running the latest version.
User Tips
- No 3.5mm Aux Port: The QCY H3S does not feature a 3.5mm auxiliary port and does not support 3.5mm audio cables. It relies on Bluetooth or Type-C wired connection.
- Glasses Friendly: The ergonomic design and soft earmuffs are generally comfortable for users wearing spectacles.
- EQ Settings: Some users find the 'Pop' EQ setting in the QCY App to provide a balanced sound profile, while other presets might have more pronounced bass frequencies. Experiment with the 7 EQ sound effects to find your preferred sound.
- Spatial Sound and LDAC: Be aware that when 360° Spatial Sound mode is activated, the LDAC codec will be temporarily turned off.
- General Troubleshooting: If you experience program errors with your phone, try turning off and on the Bluetooth function or rebooting your phone.
Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official QCY website or contact your retailer. Keep your purchase receipt as proof of purchase for any warranty claims.





