Product works very well. There are other boards here that look the same but don't perform as well as these boards. There are a few things about this item, 1cm is the longest realistic reading distance, but it suits my needs. The DIP switch is surface mount and can crack, there are weird solder points underneath, which also reduces the overall thickness of the board. The distances shown are a bit exaggerated, if you agree this is a board for the job.
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