This hand held, concealable test device will cause various affects on different machines by using short-range EMP technology. Range is up to about 3 feet or 1 meter, thus only affecting the machine in front of you. Battery powered and portable. Complete instructions are included. Many vending machines hold in excess of $50.00 change, while bill changer machines can hold in excess of $500.00. Device will work on both 120 and 220 volt systems, making it effective anywhere in the world.