QR code is a two-dimensional matrix symbol developed by DENSO Corporation.
It is available in two versions —Model 1 and Model 2 (an enhanced version of Model 1).
The BarDIMM system supports four-level error corrections and a wide range of symbol sizes.
BarDIMM can scale the code with the definition of the small black square height/width.
A QRCode symbol can include numeric and alphanumeric data with high compression, binary, Kana and Kanji data.
Maximum number of characters per QRCode symbol
| QRCode | Model 1 | Model 2 |
| Numeric | 1,167 | 7,089 |
| Alphanumeric | 707 | 4,296 |
| 8-bit byte char | 486 | 2,953 |
| Kanji characters | 299 | 1,817 |