If the picture is an actual code used (BTW it's a data matrix, not QR, you can tell by the solid L / dotted L outline): The code has 48x16 pixels. Subtract the

If the picture is an actual code used (BTW it's a data matrix, not QR, you can tell by the solid L / dotted L outline): The code has 48x16 pixels. Subtract the outlines (solid) / timers (dotted), that's 44x14 = 616 bits. IIRC error correction takes around 1/4 of that, leaving 462 bits or 57 ASCII characters.