Prepare an SDHC card with a capacity of 8G or higher, unzip the EFlasher software and the flash win32diskimager tool separately and run win32diskimagerI as administrator under the windows. On the win32diskimagerI interface, the SD card disk after decompressing the EFlasher software, click the write button to write to the SD card, or use dd to write the EFlasher software to the SD card under Linux; After the programming is completed, eject the SD card from the computer, insert the development board and boot the development board, then the system will boot from the SD card and boot automatically. EFlasher programming tool, you have multiple ways to operate EFlasher:1: Connect-compatible or LCD display and USB mouse, run EFlasher on the graphical interface,2: connect the development board to the network via network cable, log in to the development board via ssh, and then enter the eflasher to work according to the line prompts. (Note: logged in via ssh is, the password is there, and the IP development card can be viewed (obtained in the background of the router)3: log in to the serial terminal through the debug serial port, enter the eflasher on the terminal to operate; 4: connect the Icd2usb accessory to the development board, press the accessory. The K1 key above can select the system to be programmed, then press the K2 key to confirm the programming, the programming will be displayed on lcd2usb.; After the programming is completed, cut off the power, then pull out the SD card on the development board, then turn on again, the development board will boot the system you just programmed with eMMCattrial: PC + MetalColor: as shownPackage Contents:1 x M.2 Expansion Module1 x Mini PCB Adapter to connect to the onboard M.21 jack x ribbon cable1 x Mounting Screws and ScrewsOnly the above package contents, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.