Magic Tricks Playing Cards
Insight Double Blank Cards (Set of 5) by Hugo Shelley
INSIGHTHUGO_DB )  Trick
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Description:

These are extra refill cards for ESP Insight. Insight double-sided blanks are available in sets of 5 and can be programmed with any number from 1-13 using the Insight reader. They are the same thickness as normal playing cards and can be read at a distance of 4.5 inches (11.5cm).