* The Pen Works on All US Currency Printed 1960 and After
* Just Mark a Small Line on the Bill and Light Mark Passes the Test -- Dark or Black Bill May be Counterfeit
* The UV Light Works on Currency Printed 1996 and After.  Will not work on Older Bills or the $1 Bill
* The UV Light Will Cause the Polymer Security Thread Embedded in the Bill to Glow
* The UV Light Can Also be used to Authenticate Credit Cards Travelers Checks and Foreign Currencies
* Extra Batteries Included