Product Revision
The revision level of the 126/129 product can be confirmed from a label on the left side of
the product. There are two levels of digits and bar-code markings on the label, and the
fifth and sixth digits on the lower numbers indicate the product level.
For example; if the label read 1773G322580 the revision level would be G3.
Do not use the label on the right side of the product for reference of the revision level.