WS2812 5050 ANNEAU RGB 24 LEDCJMCU 24 Bit WS2812 5050 RGB LED Built in Full Color Driving Lights OD: 86mm ID: 72mm There is a single data line with a very timing specific protocol. Since the protocol is very sensitive to timing, it requires a real time microconroller such as an AVR, for Arduino, PIC, mbed, etc. It cannot be used with a Linux based microcomputer or interpreted microcontroller such as the netduino or Basic Stamp. Features: Outer Diameter: 78. 74mm (radius) Inner