This bank note tester pen works on international paper currency, including dollar, Euro, Pound, Yen, Won, Ruble, Cruzior, Pesos, Rand, Peseta, Thai Baht(THB), Taiwand Dollar(NTD). It will leave a bright yellow mark on genuine currency and a dark mark on forged one. Identify money in seconds. Features: Work on international paper currency, including Dollar, Euro, Pound, Yen, Won, Ruble, Cruzior, Pesos, Rand, Peseta, Thai Baht(THB), Taiwand Dollar(NTD). Mark note, for example, with a cross, in an area which is lightly-colored and not printed on. For genuine bank note, mark is bright yellow. For forged bank note, mark goes dark and stays dark. make will disappear again after several hours. Identify bank note in seconds, ideal helper for cashiers. Specifications: Quantity: 1pcs Item Size: 13.2 * 1.2 * 1.2cm / 5.2 * 0.5 * 0.5" Item Weight: 8.5g / 0.3oz Package Size: 25 * 9 * 1.3cm / 9.8 * 2.5 * 0.5" Package Weight: 21g / 0.8oz Package List: 1 * Money Detector Pen Note: Only tester pen is included. Work on international paper currency, including US Dollar, Euro, Pound, Yen, Won, Ruble, Cruzior, Pesos, Rand, Peseta, Thai Baht(THB), Taiwand Dollar(NTD). Usage: mark the note, for example, with a cross, in an area which is lightly-colored and not printed on. For genuine bank note, the mark is bright yellow. For forged bank note, the mark goes dark and stays dark; The make will disappear again after several hours. Identify bank note in seconds, ideal helper for cashiers.