7
— Check digit (confirms the number is well-formed)
UPC-A✓ Valid check digit
Description
Diy Open Source Sd Card Shield V4 - The New-Released Sd Card V4.0 Shield. It Provides A Storage Space For Your Arduino. Stand Sd Card¡¢Sdhc Card And Tf Card Compatible. Minimal Number Of Spi Port. Truly Stackable.