1. Introduction
The NEKING Y400 Portable Projector is a versatile and intelligent device designed to transform your viewing experience. Featuring native 1080p resolution with 4K decoding support, an Android 12 operating system, dual-band Wi-Fi 6, and Bluetooth 5.0, it offers seamless connectivity and high-quality projection. Its compact design, 240° adjustable projection angle, and automatic keystone correction make it ideal for various home entertainment scenarios, from bedroom movie watching to outdoor gatherings.

2. Package Contents
Please check the package contents upon unboxing to ensure all items are present and in good condition:
- 1 x Y400 Projector (Host)
- 1 x Remote Control
- 1 x Power Cord (EU/US/AU/UK Plug, depending on selection)
- 1 x Instruction Manual

3. Specifications
The following table outlines the key technical specifications of the Y400 Projector:
| Feature | Specification |
|---|---|
| Brand | NEKING |
| Model | Y400 |
| System | Android 12 |
| Optical Resolution | 1920x1080dpi (Native 1080P) |
| Support Video Resolution | 2560x1440 / 4096x2160 (4K Decoding) |
| Ansi Lumens | 300 |
| Contrast Ratio | 1000:1 |
| Projection Technology | LCD |
| Light Source | LED |
| Light Source Lifespan | 50,000 hours |
| Projected Dimension | 30-200 inches |
| Projection Distance | 1-4 meters |
| Screen Scale | 4:3 / 16:9 |
| Keystone Correction | Automatic Trapezoid, Electronic Trapezoid |
| Focusing Technology | Manual Focusing |
| Zoom | Focus |
| Portability | Portable |
| Weight | 730g |
| Built-in Speaker | Yes (4Ω3W Full-range speakers) |
| Bluetooth | Bluetooth 5.0 (10m stable link) |
| Wi-Fi | Dual-band WiFi 6 (2.4G/5G) |
| USB Ports | Supports USB and removable hard drive |
| AUX Audio Interface | Headphone and speaker interface |
| HDMI Interface | Supports mobile phones, computers, PSP, MP5, tablets, TVs |
| Product Voltage | 100-240V/50-60Hz |
| Power (W) | 50W |
| Product Material | ABS + Eco-friendly silicone |
| Product Size | 10.5 x 10.5 x 20.6 cm (4.13 x 4.13 x 8.11 inches) |
| Supported Languages | 32 languages |
| Certifications | CE, FCC, RoHS |


4. Setup
4.1 Placement
The Y400 Projector features a stepless silent gimbal bracket that allows for 240° rotation, providing exceptional flexibility for placement. You can project onto walls, ceilings, or any flat surface. Position the projector to achieve your desired screen size and angle.


4.2 Power Connection
Connect the provided power cord to the projector's power input port and then to a suitable electrical outlet (100-240V/50-60Hz).
4.3 Focusing
The Y400 Projector uses manual focusing. Rotate the lens ring until the projected image appears sharp and clear on the screen.
4.4 Keystone Correction
The projector supports automatic trapezoidal correction. This feature automatically adjusts the image to be rectangular even if the projector is not perfectly aligned with the screen. It also offers electronic trapezoidal correction for fine-tuning.


4.5 Connectivity
The Y400 Projector offers multiple connectivity options:
- HDMI: Connect to laptops, gaming consoles, Blu-ray players, etc.
- USB: Connect USB drives for media playback.
- AUX Audio: Connect external headphones or speakers.
- Wi-Fi 6: Connect to your wireless network for online streaming and screen casting. Supports 2.4G and 5G bands.
- Bluetooth 5.0: Connect to Bluetooth speakers, headphones, mice, and keyboards.

5. Operating Instructions
5.1 Power On/Off
Press the power button on the projector or the remote control to turn the device on or off.
5.2 Navigation
Use the included remote control to navigate the Android 12 interface, select apps, adjust settings, and control media playback.
5.3 Screen Casting
The Y400 Projector supports wireless screen casting from various devices:
- For Android/HarmonyOS: Use Miracast Screen Projection or Lebo screen casting.
- For iOS and Apple devices: Use iOS screen mirroring, MAC, or Airplay.

5.4 Media Playback and Apps
The projector comes with Android 12 and pre-installed apps like Netflix, YouTube, Disney, and Prime Video. You can also install other applications from the system's app shop. Play media directly from USB drives or connected HDMI devices.

5.5 Bluetooth Connectivity
Utilize Bluetooth 5.0 to connect external audio devices like speakers or headphones for an enhanced sound experience. You can also connect a Bluetooth mouse or keyboard for easier navigation.

5.6 Language Switching
The projector supports 32 different languages. You can switch the system language through the settings menu to match your preference.
6. Maintenance
6.1 Cleaning
- Lens: Gently wipe the projector lens with a soft, lint-free cloth. Do not use abrasive cleaners or solvents.
- Exterior: Clean the exterior casing with a soft, dry cloth. For stubborn dirt, slightly dampen the cloth with water.
- Ventilation: Ensure the ventilation openings are clear of dust and obstructions to prevent overheating.
6.2 Software Updates
The Y400 Projector supports OTA (Over-The-Air) remote upgrades. Periodically check for system updates in the settings menu to ensure optimal performance and access to the latest features.
7. Troubleshooting
If you encounter any issues with your Y400 Projector, please refer to the following common problems and solutions:
- No Image:
- Ensure the power cord is securely connected and the projector is turned on.
- Check the input source (HDMI, USB, Screen Mirroring) is correctly selected.
- Verify that the lens cap (if any) is removed.
- Blurred Image:
- Adjust the manual focus ring on the lens until the image is clear.
- Check the keystone correction settings to ensure the image is not distorted.
- No Sound:
- Increase the volume on the projector and the connected source device.
- If using external speakers, ensure they are properly connected via Bluetooth or AUX cable and are powered on.
- Connectivity Issues (Wi-Fi/Bluetooth):
- Ensure Wi-Fi and Bluetooth are enabled in the projector's settings.
- For Wi-Fi, check your network connection and password.
- For Bluetooth, ensure the device you are trying to connect is in pairing mode and within range.
- Remote Control Not Responding:
- Check and replace the batteries in the remote control.
- Ensure there are no obstructions between the remote and the projector's IR receiver.
For more detailed troubleshooting or complex issues, please consult the official User Manual (PDF) available at: Y400 Projector User Manual (PDF).
8. User Tips
- Optimal Viewing: For the best experience, use the projector in a dimly lit or dark room. The ideal projection distance is typically between 1 to 4 meters, yielding a screen size of 30 to 200 inches.
- Creative Placement: Take advantage of the 240° rotatable head to project movies onto your bedroom ceiling for a unique viewing experience, or onto an outdoor wall for a backyard movie night.
- Explore Android Apps: The Android 12 system allows you to download and use a wide range of streaming services and entertainment apps directly on the projector, eliminating the need for external devices.
- External Audio: While the projector has a built-in speaker, connecting external Bluetooth speakers or a soundbar can significantly enhance the audio quality for a more immersive home theater experience.
- Low Noise Environment: The Y400 is designed for low noise operation (as low as 25dB), ensuring your viewing experience is not disturbed by fan noise.

9. Warranty and Support
The NEKING Y400 Projector is manufactured to high-quality standards and is certified with CE, FCC, and RoHS, ensuring safety and reliability.
For detailed information regarding warranty coverage, technical support, and service, please refer to the comprehensive User Manual (PDF) provided with your product or available online at: Y400 Projector User Manual (PDF).





