Profile: MEI, Inc. is a manufacturer of unattended electronic transaction systems including bill acceptors, coin mechanisms, cashless payment systems and vending management solutions. We are an ISO 9001:2000 certified company. Our products include coin managers, multi-drop bus coin changers, micromech coin changers, coin changers and coin validators. Our coin validator is ideal for use in pool tables, video games and high-price-per-play amusement machines.