STMT6 ARM STM32 Minimum System Development Board Module For STM32F103C6T6 C6T6 ARM STM32 Development BoardSpecifications:Model: STMT6.Core: ARM 32 Cortex-M3 CPU.72MHz work frequency.64K flash memory, 20K SRAM.2.0-3.6V power, I/O.Reset(POR/PDR).4-16MHz crystal.Size: 5.3cm x 2.2cm