My current Gen 3 has 2 blue hook ups on the back of graph, i am looking to purchase another Gen3 but it has a red and a blue hookup..what is the difference between these two hookups?
My current Gen 3 has 2 blue hook ups on the back of graph, i am looking to purchase another Gen3 but it has a red and a blue hookup..what is the difference between these two hookups?
The color. :)
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