Smart Money Counterfeit Detector Pen with Reusable UV LED Light (Parallel Import)

Not very good. Seems to only work on US paper.

I used to use these at a bar I worked at. The pen is always nice, but having the UV LED light for super quick bill checking is a really nice feature. You'll see the bands glow and the watermark illuminate. I've seen bills that were clearly hand drawn so that they would look reasonably good when held up to the light, but become VERY obviously fake once hit with the black light. I ended up buying these for home use once I started selling some of my gear on Craigslist. There are a lot of counterfeit bills floating around there, and I didn't want to get scammed. The cost of these pens is a small price to pay. I guess it's hard to say how "accurate" they are. There might be counterfeits out there that are good enough to fool both the pen AND the UV LED, but at that point I'm not sure that any other measure is going to be much better.

It works fine but don’t be in the sunlight trying to check money. Any flashlight that emits a black light will work though.

These things have always helped me see whether a bill is real or not and they last me for a very long time.

Works perfectly to detect real dollar and fake dollar bill. Works with any bill that are available in the market. Very handful tool to count large amounts of bill.