QR Code Scanner Bar Code Reader

QR码扫描仪条形码阅读器，尺寸越来越小

QR Code Scanner Bar Code Reader Free And Less Size

QR code is the trademark for a type of matrix barcode first designed in 1994 for the automotive industry in Japan. A barcode is a machine-readable optical label that contains information about the item to which it is attached.

A barcode is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths and spacings of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional, can be scanned by special optical scanners, called barcode readers.