Use this in a Nevads casino and go to jail!!
The description warns you that if you use this in a casino, you could get in trouble--yes you can--lots of trouble. If you are caught with this in a Nevada casino, you will get prosecuted under the "device laws." At a minimum, thats lots of money and hassle to get off. Otherwise, youll be in the slammer.
If you need this to count cards, you shouldnt be counting at all.
Finally, it mis-defines the High-Low counting system .
This is useless and dangerous to have.
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A Blackjack Card Counter - Professional