1. Introduction
Thank you for choosing the ACEFAST H7 Hybrid ANC Noise Reduction Headphones. These headphones are designed to provide a superior audio experience with advanced features such as 35dB hybrid active noise cancellation, high-fidelity sound, and customizable replaceable earpads. This manual will guide you through the setup, operation, and maintenance of your new headphones.


2. Package Contents
Please check the box for the following items:
- ACEFAST H7 Headset (1)
- USB-C Charging Cable (1)
- User Manual (1)
- Headset Storage Bag (1)
- Replaceable Pads Set (1 pair, additional colors sold separately)

3. Product Overview
The ACEFAST H7 headphones feature a sleek design with intuitive controls and comfortable earcups. Familiarize yourself with the main components:
- Adjustable Headband: For a comfortable fit.
- Replaceable Earpads: Easily twist to detach and customize.
- Control Buttons: Located on the earcup for power, mode switching, and call management.
- USB-C Port: For charging and USB-Audio connection.

4. Setup
4.1 Charging the Headphones
Before first use, fully charge your headphones. Use the provided USB-C charging cable.
- Connect the USB-C end of the cable to the charging port on the headphone.
- Connect the USB-A end to a compatible power source (e.g., computer USB port, wall adapter).
- The charging indicator will show the charging status. A full charge takes approximately 1.5 hours.
Quick Charge Feature: A 10-minute charge can provide up to 2 hours of music playback (at 60% volume).

4.2 Power On/Off
- Power On: Press and hold the Power button until the indicator light turns on.
- Power Off: Press and hold the Power button until the indicator light turns off.
4.3 Bluetooth Pairing
- Ensure the headphones are powered off.
- Press and hold the Power button until the indicator light flashes, indicating pairing mode.
- On your device (smartphone, tablet, computer), enable Bluetooth and search for available devices.
- Select "ACEFAST H7" from the list of devices.
- Once connected, the indicator light will change, and you will hear an audio prompt.
4.4 Dual Device Connection
The ACEFAST H7 supports connecting to two devices simultaneously (e.g., a smartphone and a tablet).
- Pair the headphones with the first device as described above.
- Disconnect Bluetooth on the first device.
- Pair the headphones with the second device.
- Reconnect Bluetooth on the first device. The headphones should now be connected to both devices.
- When using a tablet, you can press the "turn on the phone" button to answer calls with the headset without switching back and forth.

4.5 App Connection
The ACEFAST H7 headphones support APP settings. Download the official ACEFAST application from your device's app store to unlock additional features and customization options.
5. Operation
5.1 Basic Controls
The headphones feature a control button for various functions. Please refer to the specific button layout on your device for exact functions. Note that volume control is not available directly on the headphones.
5.2 Active Noise Cancellation (ANC) & Transparent Mode
The ACEFAST H7 features -35dB hybrid active noise reduction technology to accurately capture and offset environmental noise, providing a cleaner and more immersive listening experience. It also includes a Transparent Mode.
- ANC Mode: Activates noise cancellation to minimize ambient sounds.
- Transparent Mode: Allows external sounds to be heard without taking off the headset, making it safer for commuting and street walking.
Switch between ANC, Normal, and Transparent modes using the dedicated button on the earcup.


5.3 Call Functions with ENC
The headphones are equipped with ENC (Environmental Noise Cancellation) call noise reduction technology. This eliminates ambient noise in a directional manner, ensuring a clearer voice signal output for calls, even in noisy environments.

5.4 Music Playback
Enjoy high-fidelity audio with the 30mm professional HiFi-level dynamic speakers. The double-layer composite diaphragm and bass guide tube technology accurately present the details of high-resolution music, delivering clear and powerful sound.

5.5 Replacing Earpads
The ACEFAST H7 features detachable earpads for customization and comfort. To replace them:
- Gently twist the earpad counter-clockwise to unlock and remove it.
- Align the new earpad with the headphone and twist clockwise to secure it.


6. Maintenance
6.1 Cleaning
- Wipe the headphones with a soft, dry cloth.
- Do not use harsh chemicals or abrasive materials.
- The earpads can be gently cleaned with a damp cloth if necessary, ensuring they are completely dry before reattaching.
6.2 Waterproof Rating
The headphones have an IP54 waterproof rating, meaning they are protected against dust ingress and splashing water from any direction. This makes them suitable for use in rainy conditions or during workouts where sweat may be present. However, they are not designed for submersion in water.

6.3 Storage
When not in use, store the headphones in the provided storage bag to protect them from dust and scratches. The headphones feature a large-angle folding design for easy storage and portability.
7. Troubleshooting
- Headphones won't turn on: Ensure the battery is charged. Connect to a power source using the USB-C cable.
- Cannot pair with device: Make sure the headphones are in pairing mode (flashing indicator light). Check that Bluetooth is enabled on your device and that the headphones are within range (<10m). Try restarting both devices.
- No sound: Check the volume level on your connected device. Ensure the headphones are properly paired.
- ANC not working effectively: Ensure the earpads are properly seated and creating a good seal around your ears.
- Call quality issues: Ensure the microphone is not obstructed. Check for strong Bluetooth connection.
8. Specifications
| Feature | Specification |
|---|---|
| Product Name | ACEFAST H7 headset |
| BT Pairing Name | ACEFAST H7 |
| Bluetooth Version | 5.4 |
| Transmission Distance | <10m |
| Audio Decoding Protocol | SBC/AAC |
| Speaker Type | Dynamic speaker |
| Speaker Size | 30mm |
| Diaphragm Material | Composite |
| Music Time | 55 Hours (45 Hours with ANC) |
| Talk Time | 40 Hours |
| Battery Capacity | 500mAh |
| Charging Time | 1.5 Hours |
| Noise Reduction Depth | -35dB |
| Waterproof Grade | IP54 |
| Charging Interface | USB-C (Supports USB-Audio) |
| Headset Weight | 167g |
| Input | 5V/0.5A |
| Product Material | ABS+PC+Leather |
| Dimensions | 175*69*205mm |
| Impedance Range | up to 32 Ω |
| Frequency Response | 20 - 20000 Hz |
| Resistance | 20 Ω |
| Number of Drivers | 2 |
| Control Button | Yes |
| Volume Control | No |
| Active Noise-Cancellation | Yes |
| Vocalism Principle | Dynamic |
| Wireless Type | Bluetooth |
| Communication | Wireless |
| Style | Headphone |
| Certification | CE |
| Origin | Mainland China |

9. User Tips
- Customize Your Look: Take advantage of the detachable earpads to change the color and style of your headphones. Additional earpad colors can be purchased separately to match your mood or outfit for every day of the week.
- Optimal ANC Performance: For the best Active Noise Cancellation experience, ensure the earpads fit snugly around your ears to create a good seal.

10. Warranty and Support
ACEFAST products are built to the highest quality standards. For warranty information, technical support, or service inquiries, please refer to the contact information provided on the product packaging or visit the official ACEFAST website.





