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UPC-A
Allow/prohibit reading UPC-A
Allow reading UPC-A
Prohibit reading UPC-A
传送校验字符
Send check character
UPC-A 条码数据固定为 12 字符,第 12 位为校验字符,用于校验全部 12 个字符的正确性,默认为
传送校验字符。
The UPC-A barcode data is fixed to 12 characters, and the 12th digit is the check character,
which is used to verify the correctness of all 12 characters. The default is to transmit the
check character.
Send check character
Do not transmit check characters