Description: 12 ultrabright smart LED pixels are arranged in PCB circle with 2" (50mm) outer diameter Each LED is addressable and smart as the driver chip is inside Single-line communication can minimize the pressure on the I/O port of the microcontroller Using the WS2812B driver chip allows peripheral circuits just need one capacitor to meet circuit requirements It can also easily pass through a Dout output port, and has cascade connection with another RGB lamp with the same chip without considering limit of shape Specification: Outer Diameter: 50mm/2 Inches Communication Interface: Single-line Communication Driver Chip: WS2812 Power Supply Volatge: DC4-7V Package Includes: 1 Piece LED Full Color Ring Board