SITCore FEZ Flea SBC GHI Electronics SITCore FEZ Flea SBC is designed for development with the TinyCLR OS. The Seeeduino Xiao form factor allows use with many existing accessories on the market. The SITCore Flea SBC provides a USB-C connector for application deployment and debugging. The GHI SITCore FEZ Flea SBC features castellated and through-hole pins, making the SBC ideal for an SoM or on a breadboard.