1. Introduction
This manual provides detailed instructions for the safe and effective operation of your Gruolin DJ Laser Light GL-A04. Please read this manual thoroughly before use and retain it for future reference. This device is designed for creating dynamic laser light effects for various events and venues.
1.1 Safety Information
- Laser Radiation: Avoid direct eye exposure to the laser beam. This product emits visible and invisible laser radiation.
- Installation: Ensure the device is securely mounted on a stable surface or truss.
- Power Supply: Use only the specified power adapter. Disconnect power before cleaning or servicing.
- Ventilation: Ensure adequate ventilation around the unit to prevent overheating. Do not block ventilation openings.
- Environment: Do not expose the device to rain, moisture, or extreme temperatures.
- Children: Keep out of reach of children.
2. Package Contents
Verify that all items are present in the package:
- Gruolin DJ Laser Light GL-A04 Unit
- Power Adapter
- Remote Control (1 CR5 battery included)
- User Manual (this document)
3. Product Overview
The Gruolin DJ Laser Light GL-A04 is a versatile laser projector capable of producing 3D animated graphics and various beam effects. It supports multiple control methods including a mobile application, remote control, DMX512, and sound activation.

Figure 3.1: Gruolin DJ Laser Light GL-A04 unit with example laser effects and app interface.
3.1 Key Features
- App Control: Design custom 3D animations, edit text, draw patterns, and program personalized shows via a mobile application. Over 200 built-in effects.
- 3D Animation: Built-in Galvo scanning system for projecting 3D animated graphics, beams, and patterns.
- Full Color Output: Produces red, green, blue, and various mixed colors (yellow, indigo, purple, white).
- Multiple Control Modes: Auto, DMX512, Music Sound, Master/Slave, Remote, and APP control.

Figure 3.2: Product dimensions and available control modes.
4. Setup
4.1 Physical Installation
- Unpack the laser light unit and all accessories.
- Place the unit on a stable, flat surface or mount it securely using the integrated bracket. Ensure the projection area is clear and free from obstructions.
- Connect the power adapter to the unit and then to a suitable power outlet.
4.2 App Installation and Connection (LIGHTELF APP)
The LIGHTELF app offers advanced control and customization of the laser light.

Figure 4.1: LIGHTELF App installation and connection process.
- Step 1: Install the app. Search for "LightElf" in your device's app store (available for Android and iOS).
- Step 2: Turn on Bluetooth. Enable Bluetooth on your mobile device.
- Step 3: Open the app. Launch the LightElf application.
- Step 4: Connect the device. Within the app, click to connect the device. You may need to grant location permissions for Bluetooth scanning to function correctly.
Warm reminder: In case of any malfunction or connection issues, restart your phone and the device, or restore location permissions for the app.
5. Operating Modes
5.1 App Control
The LightElf app offers extensive customization options:
- Custom Drawing: Draw your own patterns directly in the app. You can modify colors and shapes.
- Text Playback: Enter custom text, adjust size, display field of view, and flow speed. Up to 4 groups of text can be added, with playback duration up to 25.5 seconds per text or scene.
- Image Scanning: Scan simple patterns from images to project them. Note: Only simple patterns are supported.
- Personalized Programming: Program up to 20 scenes with your favorite patterns.

Figure 5.1: App interface for Text Playback.

Figure 5.2: App interface for Hand-drawn Patterns.

Figure 5.3: App interface for Image Scanning.

Figure 5.4: App interface for Personalized Programming.
5.2 Remote Control
The included remote control provides quick access to various functions:

Figure 5.5: Remote Control Functions.
- ON/OFF: Power on or off the unit.
- Auto Modes: Select from 3 auto modes (Auto Beam & Animated Mix, Auto Beam, Auto Animated).
- Sound Modes: Select from 3 sound modes (Sound Beam & Animated Mix, Sound Beam, Sound Animated).
- DMX Mode: Activate DMX control.
- Color Selection: Choose specific colors (Red, Green, Blue, RGB, W) or invert colors.
- Pattern X or Y Axis Rotation: Adjust pattern orientation.
- Pattern Size Adjustment: Increase or decrease pattern size.
- Sound Sensitivity Adjustment: Adjust the microphone sensitivity for sound-activated modes.
- Program Show Selection: Cycle through pre-programmed shows.
- Auto Speed Adjustment: Control the speed of auto-play effects.
5.3 DMX Control
For professional lighting setups, the GL-A04 supports DMX512 control with 16 channels. Connect a DMX controller to the unit's DMX IN port and configure the DMX address as per your lighting setup requirements. Refer to the DMX channel chart (not provided in this manual, typically found in a separate DMX guide or product appendix) for specific channel functions.

Figure 5.6: DMX Control setup.
5.4 Music Sound Mode
In Music Sound mode, the laser light reacts to ambient sound, creating dynamic effects synchronized with music. Adjust the sound sensitivity using the remote control or app to optimize responsiveness.
5.5 Master/Slave Mode
Connect multiple GL-A04 units via DMX cables to operate them in a synchronized Master/Slave configuration. One unit acts as the Master, controlling all connected Slave units.
5.6 Enhancing Visual Effects with Smoke
For the most vibrant and dynamic laser beam effects, the use of a fog or haze machine is recommended. Without atmospheric effects, you will primarily see patterns and animated graphics projected on surfaces, rather than visible beams and scanning effects in the air.

Figure 5.7: Examples of laser effects, best viewed with atmospheric haze.
6. Maintenance
- Cleaning: Regularly clean the outer casing with a soft, dry cloth. For the laser aperture, use a lens cleaning cloth and solution specifically designed for optics. Ensure the unit is powered off and unplugged before cleaning.
- Storage: When not in use, store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Inspection: Periodically check the power cable and connections for any signs of damage.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No laser output / Unit does not power on. |
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| App cannot connect to the device. |
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| Remote control is unresponsive or has poor range. |
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| Laser effects are not visible in the air. |
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8. Specifications
| Feature | Detail |
|---|---|
| Model Number | GL-A04 |
| Dimensions (L x W x H) | 8.07" x 6.62" x 4.92" (20.5cm x 16.8cm x 12.5cm) |
| Item Weight | 3.12 pounds (1.42 kg) |
| Material | Aluminum |
| Finish Type | Polished Aluminum |
| Light Source Type | Light Emitting Diode (LED) |
| Power Source | Corded Electric |
| Mounting Type | Table Mount / Surface Mount |
| Remote Battery | 1 CR5 battery (included) |
| Control Modes | APP, Remote, Sound, DMX512 (16 channels), Master/Slave, Auto |
| Bulb Features | Customizable 3D Animated Graphics, 200+ Pre-set Patterns |
9. Warranty and Support
Gruolin products are manufactured to high-quality standards. For warranty information and technical support, please refer to the contact details provided with your purchase or visit the official Gruolin website. Keep your proof of purchase for warranty claims.




