Product details Money Marker-- Detects Fake Counterfeit Bills, Universal Features: 1. The unique ink in the Detector Pen identifies notes quickly easily. 2. Genuine currency: light yellow or clear color mark. 3. Suspect currency:Brown or Dark mark appears. 4. Ideal for testify Bank Notes. These Pens is applied to a suspect Note, which use good ink. when applied to genuine note the ink the color will be dim yellow or clear, however a Fake Note will turn Black/Brown. 5. Works on international paper including:Arjantin Peso,Brezilya Cruziro,ingiltere Pound,Fransa Euro,Almanya Euro,HongKong Dolar,Italya Euro,Japon Yen,Kore Won,Macao Dolar,Malaya Dolar,Yeni Zelanda Dolar,Rusya Ruble,Guney Afrika Rand,Ispanya Peseta,Tayvan NT Dolar,Tayland Baht,A.B.D Dolar. Specification: Weight: approx. 50g Size: approx. 133*15*12mm/5.23*0.59*0.47'' Color: Black Quantity: 3Pcs Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Package Included: 3*Money Detector Pen Simply make a small mark on U.S. currency. Chemically sensitive ink works instantly. Light yellow mark passes the test, while a dark brown or black mark means the bill is suspect. Works on all new design U.S. currency (1959 and later). INSTANTLY AND EASILY DETECT FAKE BILLS - Prevent profit loss with this fast, accurate, effective counterfeit tester.