Usage:Currency Money Detector Features: Lanyard design, easy to carry Magnetic Security Thread Detector to Check US Dollars and Currencies Printed with Magnetic Ink Can be used to Checking IDs, Passports, Security Documents, Water Marks, and Can Be Used as a Blacklight Comes with a Detachable Clip-On Lanyard Requires 4xAG13 Cell Batteries Specifications: Color: Blue Length: 9cm(Not count the lanyard length) Width: 2.5cm Net Weight: 70g Notes: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight deviation for the measurement data. Package includes: 1 x UV Currency Money Detector

http://olla.gr/2-in-1-mini-magnet-testing-pen-and-uv-light-currency-money-counterfeit-detector/