Cassida All-Orientation Automatic Counterfeit Detector with Rechargeable Battery, 3.5" (Quattro) Industry-leading counterfeit detection: Cassida's patented "M" algorithm, the Quattro offers outstanding counterfeit detection combined with the lowest "false reject" rate of any manufacturer Four way scan: Insert a bill in any of the 4 possible orientations and the Quattro will verify its authenticity. Other detectors can only verify cash in one orientation Backed by Cassida's "Counterfeit Shield Guarantee": If a counterfeit bill is accepted as genuine, Cassida will reimburse you the full value of the bill within 72 hours Compact, durable and portable: the Quattro is designed for use anywhere counterfeit detection may be needed and its rechargeable battery means access to power is not required Easy-to-read digital display clearly reports PASS or FAIL for checked bills along with their denomination Make sure that the machine is properly closed before use Worn and dirty bills can cause the machine to get dirty, so we recommend that the customer follows the user guide to properly clean the machine after heavy use Read through the user manual before use