Drimark UV Pro Bill Detector (UVPRO-B) Detects UV features on drivers licenses, passports, credit cards, travelers checks and most paper currencies Perfect for restaurants and bars to prevent the passing of false identification for the purpose of enforcing the legal age for consumption of alcohol. Perfect for use by security personnel in government agencies and transportation hubs.whenever its critical to authenticate ID Utilizes 6 proprietary, high quality optimal short wave UV LEDs for effective visibility of UV features Uses 3 AAA batteries. 100+ hours on a fresh set