- Easy to use: just make a small mark on paper currency and watch the currency change color, if it's light or yellow, the paper currency is authentic, and if it's dark or black, the paper currency is counterfeit, the small mark would disappear after a while
- Main function: the counterfeit detector pen is the simplest solution to instantly identify counterfeit bills, convenient to use and check the results in seconds
- Wide application: practical tool in daily life, help you to detector true and counterfeit money, can be applied to many occasions, such as stores, small businesses, farmers markets and retail stores, etc.