The WS2812B-4020 is a electro-optical part manufactured by Worldsemi that consists of 12mA RGB SMD,2x4mm Light Emitting Diodes (LEDs). This product contains specialized LEDs that emit red, green, and blue light in a variety of combinations. This product is also RoHS compliant, meaning that it has limited amounts of hazardous materials and meets strict safety standards. This product is suitable for a wide range of lighting applications, including indoor lighting, outdoor lighting, and automotive lighting. Additionally, it is easy to install and requires minimal effort to set up and maintain.