Features: ★Two colors of Ultraviolet and white lights ★Skid-proof design & waterproof design. ★With Wrist Strap. ★To detect banknote,such as CNY,USD,Euro and other currency ★Also applicable for detecting various kinds of invoice ★Used for detecting passport,ID card,credit card,bill of exchange,cheque etc. Specification: Wavelenght of Ultraviolet: 395nm Material: Aluminum Alloy Shell color: Black Size: 13x3x3 CM Power by: 3 X AAA Batteries (not included)/ 1x 18650 Battery(not included) Package Included: 1 X LED UV Torch(Batteries not Included)