It supports most TIDBIT layouts: all switch configurations, rotary encoder positions, and OLED display. However, it is not compatible with the top-row 1.2" 16x8 LED Matrix. It's perfectly sized for a Bit-C MCU and other Pro Micro MCUs. Build your TIDBIT with 3-pin plate-mount switches or hot-swap sockets without worrying about stability or alignment. **NOTE: This listing is only for the FR4 plate. TIDBIT kit sold separately.**