Dri Mark 500 Pack Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency

These pens work as expected.

Work great !

I bought this counterfeit bill detector pen for my mom, and she is very pleased with it—she absolutely loved it. Many thanks to the seller; it is an excellent product, and I would buy it again.

The markers are a great price for how many come in a package, great way to get peace of mind since the economy is how it is. If it wasnt for these markers I would have gotten a few fake bills

My first time was real dollar with yellow right.. like it so careful myself whose meetup next time

Works well and does the job.

Good markers

I tried it on some of my own money. Seems to be fine. I'm gonna pull out the pen when I get change at Walmart. Instead of them looking at the bills, I'm gonna look at the bills.

Lo use en una hoja de maquina y marco negro. Luego lo use en un billete de dolar en tres puntos distintos y en todos dio un tono diferente. En lo personal, no me ayuda mucho

Fonctionne bien

After getting a fake 20 here in Canada we opted to get this to check USD this has saved us over $60 so far. Well worth the money

It works perfectly and on all kind of money. Fast shipping and will again.

Perfect