Identify counterfeit money with the swipe of a counterfeit pen! Just make a quick mark on any denomination bill with one of Store Supply Warehouse’s Counterfeit Detector Pens and know that you are accepting authentic funds. Instant reading, long lasting, Store Supply Warehouse has two styles in stock and available for immediate shipment! Buy a counterfeit detector pen for each register in your retail store! Works on foreign and domestic currency! Available for SAME DAY shipping on all orders placed before 3:00pm! If you have any questions about our store security productsor would like to place your order over the phone with one of our LIVE Store Supply Warehouse Consultants, don't hesitate to call 1-800-823-8887. Guaranteed satisfaction!