8x8 Square Matrix WS2812B 5050 NeoPixel 64 Way Serial RGB LED with Integrated Controllers
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WS2812B Neopixel Matrix - 64 Pixels
A super-bright WS2812B (aka Neopixel) Square Matrix with smart RGB LEDs
Data in is timing-specific so you will need to use standard Neopixel code.
Dimensions: 64 x 64mm