The ELECFreaks 8 RGB Rainbow LED Ring is a type of LED ring with 8 ultra-bright RGB LEDs placed on a circular field. This circle has an outside diameter of 3,2 cm ( 1,2 inch ) (32mm) and an inside diameter of 1,6 cm ( 0,6 inch ) (16mm). The ring can be chained. On the circular area you can see an output pin of one bead connected to an input pin of another bead.
With the single integrated microcontroller pin, you can use an external device to control the LED ring. Each bead on the circle field is addressable.