Feature:1. High-quality light source, anti-static performance with high brightness, no light flicker. 2. 144 LED lights provide strong and concentrated shadow-free illumination. 3. Compact design, built-in dimming control, brightness 0-100% adjustable. 4. Specially used for stereoscopes. It is also an industrial microscope camera light source. 5. Practical microscope accessory, reliable quality, suitable for long-term use. Specification:Item Type: LED Ring Light Material: ABS Color: As shown in the picture Application: Used for stereoscopes Number of LEDs: 144 Brightness: 30000Lx~40000Lx (0-100% adjustable) Working Distance: 50-250mm / 1.97-9.84in Working Environment Temperature: -40~45 Lifespan: 100,000 hours Working Voltage: DC 12V Plug Voltage: AC100-240V How to use:1. Install the LED ring light on the industrial microscope lens. 2. Tighten the screws to fix the LED ring light (a ring adapter can be added). 3. Connect the power, turn on the switch, and adjust the working brightness. Package List:1 x LED Ring Light 1 x Ring Adapter 1 x Power Adapter