Multifunction machine uses the latest in ultraviolet LED technology to provide the ultimate in security against counterfeit currency including washed bills. Detects the UV sensitive security thread in U.S. currency in denominations of $5 & larger. Use the original Counterfeit Detector Pen to test the paper, the UV LEDs to reveal the UV security thread, & backlight the bill with the white LEDs to reveal watermarks & micro-printing. Versatile unit also authenticates driver's licenses, passports, international currencies, credit cards, cashier's checks & more. A powerful, compact, portable & affordable solution for any point of sale application. Great for bars & restaurants that check IDs & payment methods. LEDs last for years & are powered by three C batteries or the optional AC adapter DRI351TRIAD (both sold separately). Counterfeit Bill Detector Type: Color-Change Ink; Micro-Print Detector; UV Light; Watermark Detector; Marking Color: Amber; Counterfeit Indication Mark: Black; Dark Brown; Currency: Canadian; Chinese; EU; Mexican; UK; U.S..