Pi Supply PIS-1269, for buttons in a plug and play way, relays, sensors, servos, To connect expansion modules like

The Pi Supply Octopus is a single RGB Rainbow LED. It features an on-board smart LED and an integration of control circuit along with light-emitting circuit. The Pi Supply Octopus single RGB Rainbow LED can be operated under a low voltage with a high luminance and large angle scattering.

With built-in power on reset and power down reset circuit, the LED doesn't turn on when power off
The red led is set through special processing to make the colour more balanced
The data transmission frequency can reach to 800Kbps. When the refresh rate is 30 frames/second, the number of cascades is over 1024 points