1. Introduction
Thank you for choosing the DIYPHONE LS720 Plus 72 LED Polarized Ring Light. This device is designed to provide optimal illumination for stereo microscopes and cameras, featuring advanced polarization technology to effectively eliminate glare and reflections, thereby enhancing image clarity and detail. Please read this manual thoroughly before use to ensure proper installation and operation.

Figure 1: Overview of the DIYPHONE LS720 Plus 72 LED Polarized Ring Light.
2. Product Features
- Dual-Polarization Optical Lenses: Utilizes advanced polarization technology to rotate the refraction angle through dual lenses, accurately filtering out polarized light and reducing light source brightness to effectively eliminate glare and reflection.
- Nanoscale Coating: Precise control of light reflection on the lens surface effectively reduces interference from reflected light, improving light utilization and making images clearer and richer in detail.
- Adjustable 72 LED Ring Light Source: Equipped with 72 high-brightness focusing LED lamp beads, providing uniform and soft illumination with a long lifespan. This design effectively prevents glare commonly associated with traditional light sources.
- Stepless Adjustment Technology: Allows for continuous adjustment of brightness by gently turning a knob, enabling seamless transitions between light and dark settings.
- Concentrated Illumination: The polarized ring light source features an inward tilt angle of the lamp beads, concentrating the light for high stability and focus.
- Durable Aluminum Alloy Shell: The all-aluminum alloy casing offers excellent thermal conductivity, dissipating heat efficiently to prevent overheating and ensure stable operation.

Figure 2: Illustration of the dual polarized lens system.

Figure 3: Depiction of the nanoscale coating for reflection control.

Figure 4: Comparison showing glare elimination with the polarized ring light.
3. Package Contents
Verify that all items are present and in good condition upon opening the package.
- 1 x LS720 Plus Polarized 72-LED Ring Light
4. Setup Instructions
- Unpacking: Carefully remove the ring light from its packaging. Inspect for any visible damage.
- Mounting to Microscope: The ring light is designed to fit microscope objectives with diameters between 45mm and 70mm. Slide the ring light onto the objective lens of your stereo microscope. Secure it in place using the integrated set screws. Ensure the light is firmly attached but do not overtighten.
- Power Connection: Connect the USB-C power cable to the ring light and then to a compatible 5V USB power source (e.g., a USB port on your microscope, a USB wall adapter, or a power bank).

Figure 5: The ring light mounted on a stereo microscope.

Figure 6: The ring light's design ensures uniform illumination for the microscope's field of view.
5. Operating Instructions
- Power On: Once connected to a power source, the ring light should illuminate.
- Brightness Adjustment: Locate the dimmer knob on the control unit. Rotate the knob clockwise to increase brightness and counter-clockwise to decrease brightness. The stepless adjustment allows for precise control over illumination levels.
- Polarization Adjustment: The dual-polarization lenses can be rotated to adjust the angle of refraction. Experiment with rotating the lenses to achieve the desired level of glare and reflection elimination for your specific sample and viewing conditions.
- Power Off: To turn off the light, rotate the dimmer knob counter-clockwise until the light extinguishes, or disconnect the power cable.

Figure 7: The control unit with the stepless brightness adjustment knob.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the ring light. For the lenses, use a lens cleaning solution and a microfiber cloth to avoid scratches. Do not use abrasive cleaners or solvents.
- Storage: When not in use, store the ring light in a dry, dust-free environment.
- Handling: Avoid dropping or subjecting the unit to strong impacts, as this may damage the internal components or LED beads.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on |
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| Light flickers or is unstable |
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| Glare/reflection not fully eliminated |
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8. Specifications
| Feature | Detail |
|---|---|
| Model Number | LS720 Plus 72 LED Ring Light |
| LED Quantity | 72 pieces |
| Luminance | 542.45 LM |
| Color Temperature | 10,000K - 12,000K |
| Power | 6W (DC 5V) |
| Input Voltage | DC 5V (via USB-C) |
| Material | Aluminum Alloy Shell |
| Compatible Objective Diameter | 45mm - 70mm |
| Item Weight | 10.9 ounces (approx. 309 grams) |
| Package Dimensions | 6.69 x 6.38 x 2.01 inches |
9. Warranty and Support
DIYPHONE products are manufactured with quality and performance in mind. For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official DIYPHONE website. Please retain your proof of purchase for warranty claims.