Dri Mark Dual Test 351UVCL - The Original Counterfeit Detection Marker Pen with UV LED Cap, Tests for Security Strips and Authentic Currency Paper - 1 UV Light/Pen Black/Green Plus 1 Holder with Coil

good quality, needs a dim room to see the mark but it works good

Great product, does what it's supposed to do, and it's low cost!The first one I received was missing the Currency Guide Sticker. (what's that? see attached photo) Amazon exchanged it for another. Thank you Amazon.The replacement also was missing the sticker. Amazon gave me the choice to contact the manufacturer directly. They took care of things for me, quickly. Can't remember the last time I experienced such awesome customer support!Executive summary:(1) Great Product. (2) Stellar Customer Service by Amazon. (3) Stellar Customer Service by the Manufacturer.

It works awesome the UVlight already came with batteries put in it so i could test it and it works perfectly

I use only the light, it is great!

I am a store manager and I decided to order these once I realized the store experienced multiple counterfeit bills. Since ordering these pens for my registers no more counterfeit bills!!! The UV light works perfectly with detection of colored strips in each bill!! I recommended these to our district manager and she loves it! I just ordered more to have on hand!!

The pen portion works great...

I have been doing a lot of Craigslist and OfferUp deals. I was watching some YouTube videos and learned you can use UV to help validate paper money. I love using this thing.. and my kids like using it as well. It's a tool, but it entertains my monkey brain by making parts of the US dollar glow. OOO ooo Ahhh ahhh

It works as expected

Arrived quickly, great price, Great to keep in my drawer at work. Have used one for a few years has been a great help to uncover fraud.