Introduction
Thank you for choosing the QCY H4 ANC Wireless Headphones. This manual provides detailed instructions on how to set up, operate, and maintain your new headphones. Please read this manual carefully before use to ensure optimal performance and longevity of your device.
Package Contents
Upon unboxing, please ensure all the following items are present:
- QCY H4 ANC Wireless Headphones
- USB Type-C Charging Cable
- 3.5mm Audio Cable
- User Manual (this document)

Product Overview
The QCY H4 headphones feature intuitive controls and essential ports for a seamless audio experience. Familiarize yourself with the layout:

Controls and Ports:
- Power Button: Used for powering the headphones on/off, playing/pausing audio, and answering/ending calls.
- Volume Up Button: Increases volume. Long press for next track.
- Volume Down Button: Decreases volume. Long press for previous track.
- ANC Button: Toggles between Active Noise Cancellation (ANC) mode and Transparency mode.
- Type-C Charging Port: For charging the headphones.
- 3.5mm Audio Jack: For wired audio connection.
- Microphone: For calls and voice assistant.
Setup
1. Charging the Headphones
Before first use, fully charge your QCY H4 headphones.
- Connect the USB Type-C charging cable to the charging port on the headphones.
- Connect the other end of the cable to a USB power adapter (not included) or a computer's USB port.
- The LED indicator will show charging status (e.g., red for charging, blue/off for fully charged).
2. Bluetooth Pairing
To connect your headphones to a device via Bluetooth:
- Power On: Press and hold the Power Button until the LED indicator flashes (usually blue and red alternately), indicating pairing mode.
- Enable Bluetooth: On your device (smartphone, tablet, computer), enable Bluetooth.
- Select Device: In your device's Bluetooth settings, search for available devices and select "QCY H4".
- Confirm Connection: Once connected, the LED indicator on the headphones will typically show a steady blue light or turn off, and you will hear an audible confirmation.
- Dual Device Connection: The QCY H4 supports connecting to two devices simultaneously. After connecting to the first device, put the headphones back into pairing mode and connect to the second device. The headphones will intelligently switch between devices.
Operating Instructions
Power On/Off
- Power On: Press and hold the Power Button for approximately 3 seconds.
- Power Off: Press and hold the Power Button for approximately 5 seconds.
Music Playback
- Play/Pause: Short press the Power Button.
- Next Track: Long press the Volume Up Button.
- Previous Track: Long press the Volume Down Button.
- Volume Up: Short press the Volume Up Button.
- Volume Down: Short press the Volume Down Button.
Call Management
- Answer/End Call: Short press the Power Button.
- Reject Call: Long press the Power Button.
Active Noise Cancellation (ANC) & Transparency Mode
- Toggle Modes: Short press the ANC Button to cycle through ANC On, Transparency Mode, and ANC Off.
Voice Assistant
- Activate Voice Assistant: Triple-press the Power Button (specific gesture may vary, refer to QCY App for customization).
Wired Mode
To use the headphones in wired mode:
- Connect one end of the 3.5mm audio cable to the headphone's 3.5mm audio jack.
- Connect the other end to your audio source's 3.5mm output.
- The headphones will automatically switch to wired mode, and Bluetooth will be disabled.
QCY App Support
Download the official QCY App to unlock additional features, customize controls, and update firmware for your H4 headphones.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the headphones. Do not use harsh chemicals or abrasive materials.
- Storage: When not in use, store the headphones in a cool, dry place. The foldable design allows for compact storage.
- Water Resistance: The headphones are waterproof (rating not specified, avoid submersion). Do not expose to excessive moisture.
- Battery Care: To preserve battery life, avoid fully discharging the headphones frequently. Charge regularly.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| Headphones won't turn on | Ensure the headphones are fully charged. |
| Cannot pair via Bluetooth | Make sure headphones are in pairing mode (flashing LED). Turn off and on Bluetooth on your device. Forget previous pairings and try again. Ensure headphones are within 10m range. |
| No sound | Check volume levels on both headphones and connected device. Ensure headphones are properly connected (Bluetooth or wired). |
| ANC not working effectively | Ensure ANC mode is activated. Adjust headphone fit for a better seal around your ears. |
| Sound quality issues | Try a different audio source or device. Ensure no physical obstructions are blocking the drivers. |
Specifications
| Feature | Specification |
|---|---|
| Brand | QCY |
| Model | H4 |
| Material | ABS |
| Weight | 291.2g |
| Battery Life (up to) | 70 hours |
| Bluetooth Version | 5.2 |
| Maximum Wireless Range | <10m |
| Communication | Wireless (Bluetooth), Wired (3.5mm) |
| Connectors | Type-C, 3.5mm Audio Jack |
| Charging Method | Cable (Type-C) |
| Active Noise-Cancellation | Yes |
| Sound Isolating | Yes |
| With Microphone | Yes |
| Voice Assistant Built-in | Yes |
| Support APP | Yes |
| Waterproof | Yes (Note: Avoid submersion) |
| Style | Over-ear headphones |
User Tips
- For the best noise-cancelling experience, ensure the earcups form a good seal around your ears.
- Utilize the QCY App to customize equalizer settings and button functions to personalize your audio experience.
- When switching between devices with dual connection, ensure the audio on the currently playing device is paused before starting playback on the second device for a smoother transition.
- If experiencing latency during gaming, ensure the low latency gaming mode is activated via the QCY App or specific button combination (refer to app for details).
Warranty and Support
QCY products are designed and manufactured to the highest quality standards. For warranty information and technical support, please refer to the official QCY website or contact your local distributor. Keep your proof of purchase for any warranty claims.





