This is a ring of 24 ultra-bright smart NeoPixels, arranged in a 2.6" (66mm) diameter circle. The rings are 'chainable' - connect the output pin of one to the input pin of another, and you can chain as many as you'd like together! Each LED has a built-in driver chip, making every LED individually addressable. They each have a constant current driver of approximately 18mA, so the color will remain consistent even if the input voltage fluctuates. There's no need for external current-limiting resistors or other components to keep the design sleek. Power them with 5VDC (4-7V works) and you're ready to go.
They use a special protocol called the timing-specific protocol as they are very sensitive to timing. This means you'll need a real-time microcontroller like AVR, Arduino, PIC, mbed, etc. They can't be used with Linux-based microcomputers or interpreted microcontrollers like netduino or Basic Stamp since they require manual configuration. However, other platforms might have a compatible driver code available, so it's worth checking online. An 8MHz or faster processor is required.
The NeoPixel Ring comes pre-assembled and tested with 24 individually addressable RGB LEDs.
You can order the NeoPixel Ring - Integrated Driver 24 x 5050 RGB LED product from the Adafruit category at SAMM Market at a competitive price with same-day shipping and fast delivery.