This is bullshit, but you should have them unless your system is hardwired. They work for about 2-3 months and then either start saving the old lens readings or don't save the new data. Marco takes care of it terribly - no guarantees and even if you try to use a square trade guarantee they refer you back to Marco for the first year and then take over. I think I'll see what happens with it in a year, maybe I'll find a replacement then. I love Marco gear but this is ridiculous - especially at $95 for 5 of these plastic pieces.
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