Features: 1. FSMC LCD interface 2. CH340C one click download circuit 3. Standard JTAG/SWD interface 4. NRF24L01 interface 5. -SD interface.W25Q16 Flash Specifications: CPU core: ARM - Maximum dominant frequency of CPU: 72MHZ Operating voltage range: 2V~3.6V Internal vibrator: Yes FLASH capacity: 512K@x8bit RAM capacity: 64KB Number of GPIO ports: 112 (units/channels/digits): 1@x21ch /12bit DAC (units/channels/): 1@x2ch /12bit Peripheral/function/protocol stack: temperature sensor; DMA; Watching ; POR; PWM Operating temperature range: - 40 ~+85 Development board size: 96.5 x 76.2mm Material: PCB colour: black Package Contents: 1 x STM32F103ZET6 development board 1 x USB cable Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.