... 50/60HZOut put: DC 12VPower Consumption: 4.5WQuantity of LED bulbs: 144PCSBrightness; above20000Lux (on working distances 100mm)Adjustable range ... .D. Φ61mm , O.D. Φ98mmColor-Temperature:6400K(customize)LED available color: white, red, green, blueWorking distance:40-250mmMaterial ... :according to requestWarranty time: 2 year YK-B144T LED ring light , 4 zones separately control,microscope led ring light