Introduction Put hidden lens inside of carkey,it can scan marked cards.The user can know the poker games result through the poker analyzer. Description: Put hidden lens inside of carkey,it can scan marked cards.The user can know the poker games result through the poker analyzer. It can work for all levels of poker smooth sayer and poker analyzer. It is used for all generations of poker smoothsayer and poker analyzer. It looks like a normal carkey ,but there is a hidden lens inside. Distance: 10-15cm,20-30cm,40-50cm Estimate working hours: About 2-3 hours Specification: It contains 1pcs carkey lens and 1 pcs of charger.