It's a snap-fit enclosure for Wemos D1 Shield v3.0. This model requires 4x 2.5 self-tapping screws to hold down the pcb to the enclosure.
https://github.com/srg74/WLED-wemos-shield
You can also buy the board here:
https://www.tindie.com/products/serg74/wled-shield-board-for-addressable-leds/
The author hasn't provided the model origin yet.