Seeed Studio 104020128, Grove - RGB LED Ring for WS2813

The Grove - RGB LED Ring (20 - WS2813 Mini) is a mini version of WS2813 Digital RGB LED Ring. The RGB LED Ring are 3535-sized LEDs with an embedded microcontroller inside the LED. The WS2813s are each addressable as the driver chip is located inside the LED. Each LED has a constrant current drive so the colour will be very consistent even if the change of the voltage.

The control circuit and RGB chip are integrated in a 3535 components, to form an external control pixel.
Intelligent Reverse-connection protection.
Built-in signal reshaping circuit
256 grey level and 16777216 full-colour display
Dual-signal wires version, signal break-point continuous transmission