Features: 1. FSMC LCD interface2. CH340C one click download circuit3. Standard JTAG/SWD interface4. NRF24L01 interface5. -SD interface.W25Q16 FlashSpecifications:CPU core: ARM -Maximum dominant frequency of CPU: 72MHZOperating voltage range: 2V~3.6VInternal vibrator: Yes FLASH capacity: 512K@x8bit RAM capacity: 64KBNumber of GPIO ports: 112 (units/channels/digits): 1@x21ch /12bitDAC (units/channels/): 1@x2ch /12bitPeripheral/function/protocol stack: temperature sensor; DMA; Watching ; POR; PWMOperating temperature range: - 40 ~+85 Development board size: 96.5 x 76.2mmMaterial: PCBcolour: blackPackage Contents:1 x STM32F103ZET6 development board1 x USB cableOnly 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.