Item Type: Development Module Material: PCB Core: Cortex Mo Storage Resources: 16K Flash, 4KB SRAM External Crystal Oscillator: 8MHz Board Power Supply: Mini USB (DC-5V) Debug Download Interface: For SWD, for ISP 1External Module: All 10 ports lead out, with silk screen, convenient to connect various modules, safe and reliable 2Convenient Power Supply: The serial port is led out separately, and there are multiple groups of 3.3V 5V power supplies, convenient for supplying power to external function modules 3Download Interface: With user LED light and power LED light, reset button, serial port download BOOT selection, for SWD mode download interface 4USB Power Supply: 8MHz external crystal oscillator, powered by USB, small area, easy to apply and embed in your device 5PCB Material: This development board is made of PCB material, with Cortex Mo core, adopts precise and meticulous design 1 x Development Board 2 x Pin Header