1. Product Overview
The AUN A004 Pro is a portable Full HD Android projector designed for home cinema and entertainment. It features 4K decoding, 1080P physical resolution, electric focus, and smart Android TV OS for a comprehensive multimedia experience.
Watch the official overview video for a quick introduction to the AUN A004 Pro projector:
2. Package Contents
Ensure all items are present in the package:
- AUN A004 Pro Projector
- Remote Control
- Power Cable (EU/US/AU/UK Plug, depending on selection)
- User Manual (this document)

3. Specifications
| Feature | Specification |
|---|---|
| Brand | AUN |
| Model | A004 Pro |
| System | Android TV OS |
| Optical Resolution | 1920x1080dpi (Full HD) |
| Max Supported Resolution | 4K |
| Brightness | 20000 Lumens (peak) / 9000 Lumens (True Brightness) |
| Contrast Ratio | 2000:1 |
| Projected Dimension | 40-200 inches |
| Recommended Screen Size | 60-150 inches |
| Projection Distance | 1.39-6.80 meters |
| Throw Ratio | 1.33:1 |
| Screen Scale | 4:3/16:9 |
| Zoom | Digital Zoom (1.5x) |
| Keystone Correction | Manual, Electronic, Auto (Vertical, 4-Angular) |
| Projection Technology | LCD (4.0 inch Optical Engine) |
| Light Source | LED Light |
| Light Uniformity | 90% |
| Built-in Speaker | Yes (4Ω 5W) |
| Input/Output | 3.5mm Earphone Out, HDMI, POWER, USB, AV |
| Bluetooth | Bluetooth 5.0 |
| WiFi | 2.4G & 5G (WIFI6 support) |
| CPU | HiSilicon352 |
| RAM | 1G |
| ROM | 8G |
| Power Consumption | 65W±2W |
| Input Voltage | AC 110-240V 50-60HZ |
| Dimensions (L*W*H) | 241.2 x 209 x 98 mm |
| Weight | 1.7 kg |
| Certifications | CE, FCC, RoHS, WEEE |
4. Setup Guide
4.1 Power Connection
- Connect the provided power cable to the projector's POWER port.
- Plug the other end of the power cable into a suitable AC power outlet (110-240V, 50-60Hz).
- Press the power button on the projector or remote control to turn it on.

4.2 Placement and Projection
The AUN A004 Pro offers flexible placement options for various home theater setups:
- Table Top: Place the projector on a flat surface in front of the screen.
- Ceiling Mount: Mount the projector upside down on the ceiling. Adjust projection settings for inverted image.
- Back Projection: Project from behind a translucent screen. Adjust projection settings for mirror image.
- Stand: Use a compatible projector stand for adjustable height and angle.
Ensure the projector is placed within the optimal projection distance of 1.39-6.80 meters to achieve a screen size between 60-150 inches for the best viewing experience.

4.3 Initial Focus and Keystone Correction
After powering on, adjust the image for clarity and shape:
- Electric Focus: Use the remote control to easily achieve a focused picture. The projector also supports manual focus adjustment.
- Keystone Correction:
- Vertical Automatic Correction: The projector automatically corrects vertical distortion when moved.
- Manual Correction: Access settings to manually adjust vertical, left, or right keystone.
- 4 Angular Free Shifts: Use the four-corner adjustment feature to square the image from various projection angles.


5. Operating Instructions
5.1 Android TV OS Navigation
The AUN A004 Pro runs on Android TV OS, providing access to a wide range of applications and online content.
- Use the remote control to navigate through the home screen, apps, videos, music, and settings.
- Access the App Store or Google Play Store to download and install additional applications.

5.2 Connectivity
- Wi-Fi: Connect to your home network (2.4G or 5G, supports WIFI6) for internet access and online streaming.
- Bluetooth: Pair with Bluetooth 5.0 compatible devices such as external speakers or headphones.
- HDMI: Connect external devices like TV boxes, gaming consoles (XBOX, PS, Switch), or computers via the HDMI port.
- USB: Plug in a USB disk to play videos and view pictures directly.
- 3.5mm Earphone Out: Connect external audio devices.
- AV: Connect older devices using an AV cable.
5.3 Content Streaming and Mirroring
The A004 Pro supports wireless content sharing:
- AirPlay/Miracast/WIFI Display: Easily connect and mirror the screen from your iOS or Android devices (phones, tablets) via dual-band Wi-Fi.

5.4 Digital Zoom
Adjust the size of the projected image without moving the projector:
- Use the digital zoom feature (up to 1.5x) to shrink the projected image to fit your screen perfectly. This is useful for fine-tuning the image size after initial placement.

6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your projector.
- Cleaning the Lens: Use a soft, lint-free cloth specifically designed for optical lenses. Do not use abrasive materials or harsh chemicals.
- Dust Removal: Regularly clean the projector's vents to prevent dust buildup, which can affect cooling and performance. Use a soft brush or compressed air. The sealed optical engine helps protect internal components from dust.
- Storage: When not in use for extended periods, store the projector in a cool, dry place, protected from dust and extreme temperatures.

7. Troubleshooting
- No Power:
- Ensure the power cable is securely connected to both the projector and the power outlet.
- Verify the power outlet is functional.
- No Image:
- Check if the projector is powered on.
- Verify the input source (HDMI, USB, etc.) is correctly selected.
- Ensure the connected device is powered on and outputting a signal.
- Blurry Image:
- Adjust the electric focus using the remote control.
- Check the projection distance and ensure it's within the recommended range (1.39-6.80 meters).
- Distorted Image (Trapezoid Shape):
- Use the keystone correction features (Vertical Automatic Correction, Manual Correction, or 4 Angular Free Shifts) to adjust the image shape.
- No Sound:
- Check the volume settings on both the projector and the connected source device.
- If using external speakers, ensure they are properly connected and powered on.
- Verify Bluetooth connection if using wireless audio.
- Wi-Fi Connectivity Issues:
- Ensure your Wi-Fi router is working correctly.
- Check if the projector is within range of your Wi-Fi signal.
- Try restarting the projector and your router.
8. User Tips
- Optimal Viewing Environment: For the best picture quality, especially with high brightness, use the projector in a dark or dimly lit room. While it has high lumens, direct daylight can still wash out the image.
- Brightness Clarification: The projector boasts 20,000 peak lumens, with a "True Brightness" of 9,000 lumens. This high brightness is suitable for various environments, but performance is always best in darker settings.
- No Internal Battery: The AUN A004 Pro does not have a built-in battery and requires a continuous AC power connection for operation.
- Built-in Speaker: The projector includes a built-in 4Ω 5W HIFI speaker for convenient audio playback. For a more immersive experience, consider connecting external speakers via Bluetooth or the 3.5mm audio out port.
- Outdoor Use: The projector can be used outdoors, for example, on an open terrace, but ensure it is protected from moisture and direct sunlight. Optimal viewing will still require low ambient light conditions.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact details provided by your retailer or the official AUN support channels.
Please note that this manual provides general instructions. Specific warranty terms and support procedures may vary by region and retailer.