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docs/Offiially_Supported_Microcontrollers.md

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+# Officially supported microcontrollers
+While most Circuitpython devices are great for hand wired keyboards, most keyboards are designed to accept a pro micro. The boards listed below either are, or can be adapted to that pinout to use common keyboards already on the market.
+
+## Nice!Nano
+Features include
+- Pro-micro pinout
+- Both USB HID and Bluetooth support
+- Can do bluetooth split keyboards with no wires at all
+- Has battery support including charging
+
+Downsides
+- \$25 USD per microcontroller at most retailers
+
+Recommended Retailers
+[Boardsource](https://boardsource.xyz/store/5f4a1733bbaa5c635b83ed67)
+[NiceKeyboards](https://nicekeyboards.com/collections/group-buy/products/nice-nano-v1-0).
+
+## ItsyBitsy M4 Express
+Features include
+- Affordable at \$15 USD
+- Can run most features of KMK including RGB
+
+Downsides
+- Needs adapted to work with pro-micro pinout keyboards. Adapter can be found [HERE](https://github.com/KMKfw/kmk_firmware/tree/master/hardware)
+
+Recommended Retailers
+[Adafruit](https://www.adafruit.com/product/3800)
+
+## Adafruit ItsyBitsy nRF52840 Express
+Features include
+- Both USB HID and Bluetooth support
+- More affordable than the Nice!Nano at only \$18
+
+Downsides
+- Needs adapted to work with pro-micro pinout keyboards. Adapter can be found [HERE](https://github.com/KMKfw/kmk_firmware/tree/master/hardware)
+- No battery support without addon board found[HERE](https://www.adafruit.com/product/2124) 
+
+## Other microcontrollers
+What you'll need to have at minimum
+- CircuitPython/KMKpython
+- 256KB of flash storage
+- HID over USB and/or Bluetooth.