These are 9×16 Charlieplexed LEDs designed to match with the Adafruit 16×9 Charlieplexed PWM LED Matrix Driver — IS31FL3731. You don’t get any resistors or driver chips with this grid, its just a mess of LEDs in a charlieplexed arrangement
This is the Blue version. Check out our other colors!
Check out our detailed tutorial for Arduino & CircuitPython support, pinouts, assembly, wiring, and more!