http://www.nanxingtec.com/money-detector/
The money counterfeit detector pen is specially formulated to deliver accurate and easy results within seconds.
Protect yourself from counterfeit money by checking and rejecting bad currency with a bill marker counterfeit marker currency pen. Comes in a BOX of 1 pack of money pen detector, the individual packaging preventing each money marker counterfeit bill detector from drying out,lengthens the life of each money pen and helps a business earn more.