SparkFun MicroMod STM32 Processor Offers the most powerful and economical microcontrollers Comes with the M.2 MicroMod connector Features a floating-point unit (FPU) single precision Provides an economical and easy to use development platform Utilizes the DFU bootloader for uploading code The SparkFun MicroMod STM32 Processor provides you with an economical and easy-to-use development platform if you're needing more power with minimal working space. With the M.2 MicroMod connector, connecting your STM32 Processor is a breeze. Simply match up the key on your processor's beveled edge connector to the key on the M.2 connector and secure it with a screw (included with all Carrier Boards). The STM32 is one of the most powerful and economical microcontrollers available so to be able to add it to your MicroMod Carrier Board is a huge advantage for your project!