1. Introduction
Thank you for choosing the ATK Neptune N9 Pro/N9 Ultra Wireless Gaming Headset. This manual provides detailed instructions on how to set up, operate, and maintain your new headset to ensure optimal performance and an immersive gaming experience. The Neptune N9 series features advanced audio technology, versatile connectivity, and a comfortable design for extended use.

Image: ATK N9 Pro Neptune Wireless Gaming Headset highlighting features like 130+ hours battery, 270g lightweight, 4-mode connectivity, ENC, and 53mm dynamic driver.
2. Package Contents
Please check the box for the following items:

Image: Contents of the ATK N9 series package, showing the headset and accessories.
- 2.4G Wireless Transmitter (including adapter)
- Type-C to USB-A Data Cable
- Type-C to 3.5mm Audio Cable
- Detachable Microphone
- User Guide (this manual)
- Warranty Voucher
- Safety Specification Guide
3. Product Overview
3.1 Key Features
- Gold Standard Quality: Flagship-grade Hi-Fi audio and eSports precise sound positioning.
- Large 53mm Dynamic Drivers: Titanium-plated dynamic driver unit for stunning dynamic response and detailed sound.
- Lightweight Design: Approximately 270g with an upgraded steel fork structure and alloy curved beam for comfort.
- All-Weather Comfort: Protein leather ear cushions and reinforced headband for long-term wear without pressure.
- Long-lasting Battery Life: 1500mAh battery providing up to 130+ hours of use.
- Four-Mode Connection: Versatile connectivity including 2.4G wireless, Bluetooth, 3.5mm wired, and USB Sound Card mode.
- "Universe" Spatial Audio: Hardware-level virtual algorithm support for immersive gaming.
- "StarPick" Technology: 10mm detachable omnidirectional microphone with ENC noise reduction for clear communication.
- Low-Latency Experience: 2nd Generation SmartSpeedx Wireless Transmission Technology with 10ms ultra-low one-way latency.
- Real-time In-ear Monitoring: Low-latency instant monitoring feature.
- Multiple Customization: Supports ATKHUB3.0 software for battery display, volume adjustments, multi-band EQ, and virtual 7.1 surround sound.
3.2 Headset Controls

Image: Detailed diagram showing the function indicators of each button in 2.4G mode.
- Switch 2.4G/BTC: Press once to switch between 2.4G and Bluetooth modes.
- Play/Pause: Press once to play or pause media.
- Volume Increase: Press once to increase volume.
- Previous Track: Press twice to go to the previous track.
- Maximum Volume: Long press to reach maximum volume.
- Volume Reduction: Press once to decrease volume.
- Next Song: Press twice to go to the next song.
- Minimum Volume: Long press to reach minimum volume.
- Microphone On/Off: Press once to toggle microphone.
- Spatial Audio On/Off: Press twice to toggle spatial audio.
- Ear Monitoring On/Off: Press three times to toggle ear monitoring.
4. Setup and Initial Use
4.1 Charging the Headset
Before first use, fully charge your headset. Connect the Type-C end of the data cable to the headset's charging port and the USB-A end to a power adapter (not included) or a computer's USB port. The headset features NTC Temperature Control and supports playing while charging.

Image: Illustration of the headset's 1500mAh battery capacity and long battery life.
*Do not charge the headphones with a power adapter; use the data cable to connect to a computer for charging. (Note: For optimal safety and to follow manufacturer's specific guidance, use a computer USB port for charging as indicated by the source image.)
4.2 Attaching the Microphone
The 10mm omnidirectional microphone is detachable. Insert the microphone into the designated port on the headset until it clicks securely into place. Ensure it is firmly connected for optimal voice pickup.

Image: Headset showing the detachable microphone and its connection point, highlighting "StarPick" technology for clear calls.
5. Operating Modes
The ATK Neptune N9 series supports four connection modes for seamless use across various scenarios:

Image: Visual representation of the four connection modes: 2.4G wireless, Bluetooth, 3.5mm audio, and USB Sound Card.
| Connection Mode | Compatible Platforms |
|---|---|
| 2.4G Mode | Mobile, tablet, laptop, desktop, NS, PS4/5 |
| Bluetooth Mode | Mobile, tablet, laptop, desktop, NS |
| 3.5mm Mode | Mobile, tablet, laptop, desktop, NS, PS4/5, XBOX |
| USB Sound Card Mode | Mobile, tablet, laptop, desktop, NS, PS4/5 |
*When using Type-C to 3.5mm audio cable, it is in 3.5mm mode. When using Type-C to Type-A or Type-C to Type-C, it is in USB sound card mode.
5.1 2.4G Wireless Connection
For ultra-low latency gaming, use the 2.4G wireless transmitter. Plug the transmitter into your device's USB port. The headset will automatically connect. The 2nd Generation SmartSpeedx Technology ensures a stable connection with approximately 10ms latency.

Image: Illustration of the 2.4G wireless transmitter, emphasizing 10ms ultra-low one-way latency.
5.2 Bluetooth Connection
To connect via Bluetooth, press the "Switch 2.4G/BTC" button once to enter Bluetooth pairing mode. Search for "ATK Neptune N9" on your device's Bluetooth settings and select it to pair.
5.3 3.5mm Wired Connection
For universal compatibility, use the included Type-C to 3.5mm audio cable. Connect the Type-C end to the headset and the 3.5mm jack to your audio source.
5.4 USB Sound Card Connection
Connect the headset to your device using the Type-C to USB-A data cable. This mode utilizes the headset's internal sound card for digital audio transmission.
6. Advanced Audio Features
6.1 "Universe" Spatial Audio
Experience immersive sound with ATK's self-developed hardware-level and "Universe" spatial audio. This feature, combined with a virtual algorithm, elevates spatial sound for clearer sound localization, helping you pinpoint enemy footsteps and gunshots more accurately in games.

Image: Headset illustrating "Universe" Spatial Audio, showing enhanced sound localization for gaming scenarios like footsteps and gunshots.
6.2 Real-time In-ear Monitoring
The headset supports low-latency instant in-ear monitoring, allowing you to hear your own voice clearly during communication, which can improve call quality and comfort.

Image: Visual representation of the real-time in-ear monitoring feature.
7. Software Customization (ATKHUB3.0)
Unlock the full potential of your ATK Neptune N9 headset with the ATKHUB3.0 client driver software. This software allows for multiple customizations, including:
- Battery display
- Various volume adjustments
- Customizable sound effects with multi-band EQ adjustment
- Virtual 7.1 surround sound settings
Visit www.atkgear.com for product-driven downloads and other services.

Image: Screenshot of the ATKHUB3.0 software interface, demonstrating customization options for the headset.
8. Maintenance and Care
- Cleaning: Use a soft, dry cloth to clean the headset. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the headset in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the headset frequently. Charge it regularly, even if not in use for extended periods.
- Microphone: Handle the detachable microphone with care. Ensure it is properly aligned when attaching or detaching to prevent damage.
9. Troubleshooting
- No Sound:
- Check volume levels on both the headset and your connected device.
- Ensure the correct audio output device is selected on your computer/console.
- Verify the connection mode (2.4G, Bluetooth, 3.5mm, USB) is correctly set up and stable.
- Recharge the headset if the battery is low.
- Microphone Not Working:
- Ensure the microphone is securely attached and not muted (check headset controls and device settings).
- Verify the correct input device is selected in your device's sound settings.
- Check for any software conflicts or privacy settings blocking microphone access.
- Connection Issues (2.4G/Bluetooth):
- Move closer to the transmitter/device to reduce interference.
- Try re-pairing the Bluetooth connection or re-plugging the 2.4G transmitter.
- Ensure no other devices are causing significant wireless interference.
- Distorted Audio:
- Lower the volume on both the headset and the source device.
- Check for loose cable connections in wired modes.
- Ensure the audio source is not overdriven.
10. Specifications

Image: Detailed product parameter table for the ATK Neptune N9 series wireless gaming headset.
| Parameter | N9 Pro | N9 Ultra/N9 Ultra+ |
|---|---|---|
| Name | ATK Neptune N9 Series Wireless Gaming Headset | |
| Model | N9 Pro | N9 Ultra/N9 Ultra+ |
| Color matching | Black/White | Star Orange/Stellar Pink |
| Sound | "Cosmic" Spatial Audio | |
| Driver unit | 53mm PET Diaphragm Dynamic Driver Unit | 53mm Titanium Diaphragm Dynamic Driver |
| Frequency response range | 20Hz-20kHz | 10Hz-40kHz |
| Ear Mask | Protein leather ear cushions | |
| Microphone Monitoring | Support | |
| Battery Capacity | 1500mAh | |
| Battery life | 130 hours | |
| Weight | Approximately 270g | |
| Microphone | "StarPick" Omnidirectional ENC Noise-Cancelling Microphone | |
| Delay | 10ms Single Direction | |
| Driver | ATKHUB3.0 Client Driver | |
| Adaptable platforms | PC/Android/iOS/NS/PS4/PS5 | |
| Connection mode | True 4-in-1 Connection: 2.4G / Bluetooth 5.3 / USB Sound Card / 3.5mm | |
| More functions | Virtual 7.1 Surround Sound, Ear Monitoring, Battery Display, EQ Adjustment, Preset Audio Effects | |
11. User Tips
- For the best gaming experience, especially in competitive titles, utilize the 2.4G wireless mode for its ultra-low latency.
- Experiment with the ATKHUB3.0 software's EQ settings to find the audio profile that best suits your preferences for different games or media.
- When using the microphone, ensure it is positioned correctly near your mouth for clear voice pickup and to maximize the effectiveness of the ENC noise reduction.
- Regularly check for firmware updates via the ATKHUB3.0 software to ensure you have the latest features and performance improvements.
12. Warranty and Support
Your ATK Neptune N9 Pro/N9 Ultra Headset comes with a warranty. Please refer to the included Warranty Voucher for specific terms and conditions. For technical support, product downloads, and additional services, please visit the official ATK GEAR website: www.atkgear.com.
For any issues not covered in this manual, please contact customer support through the website or your point of purchase.
Important Notes
- Product images in this manual are for display only and may vary slightly from the actual product.
- All data shown are theoretical values; reasonable errors may occur in actual testing.
- 2.4G mode one-way latency is approximately 10ms based on professional instrument test data from ATK Lab; actual results may vary.
- Product specifications, parameters, components, and appearance details may change due to supplier changes, production batches, etc. ATK will adjust accordingly.
- Battery life tested in lab under 50% volume with Bluetooth on. Actual usage time may vary due to individual usage habits, environment, and battery cycle count.

Image: General disclaimers regarding product information accuracy and testing conditions.