Micro-SD card holder: used for SD card image burning Quad-core ARM Cortex-A35 CPU, ARM architecture v8-A instruction set Supports multiple interfaces such as GPIO, UART, SPI, I2C, MIC, etc., convenient for development and debugging Onboard DDR3-2Gbit storage SDRAM memory, clock frequency 1.066GHz Onboard 2.4G wireless transceiver chip and Ethernet transceiver support WIFI and ETH (rate 100M) Type-C port: power supply port + ADBO UART serial port: connect USB to TTL module for serial port debugging (pins 2-4-6-8 correspond to: 5V-GND-TX-RX) Reset button: reset button maskrom button: by default, SDNAND starts before TF card. Pressing the maskrom button can ignore SD NAND flash memory when ROCK PiS starts (need to prepare Flash and Q15 transistors for use, see schematic diagram 5_TF_USB for details) Wireless transceiver chip: RTL8723DS ETH network port: 100M network port SPI_Flash memory: used for SPI NAND FLASH image burning (need to prepare) DDR3 memory: SDRAM_K4B2G1646E Colour:As Shown Material:Plastic Package Contents: 1 * Development Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.