1Highquality light source, highbrightness antistatic performance, no light flickering. 2144 LED lamp beads provide strong and concentrated shadowless lighting. 3Compact design, builtin dimming control, brightness 0100% adjustable. 4Specially used for stereo telescopes. It is also an industrial microscope camera light source. 5Practical microscope accessory, reliable quality, suitable for longterm use. Item Type: LED Ring Light Material: ABS Color: As shown in the picture Application: Used for stereo telescopes Number of LEDs: 144 Brightness: 30000Lx~40000Lx (0-100% adjustable) Working Distance: 50-250mm / 1.97-9.84in Working Environment Temperature: -40~45 Life: 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. Plug in the power, turn on the switch, and adjust the working brightness. 1 x LED Ring Light 1 x Ring Adapter 1 x Power Adapter