There are many different types of bill changers. Some changers are front loading and some are rear loading. The rear loading machines are usually made to mount to a wall, which offers additional security. There are also different sizes of bill changers. Some are very small and are made to sit on a countertop. These changers are typically pretty low-cost and perform only simple functions. They are great for small vending areas and bars that have arcade games and billiard tables. Others are mounted on pedestal bases or are freestanding. This allows the bill changer to be placed anywhere within the facility. Bill Changers also vary by how many bills they can accept. A "mini" bill changer may hold as few as 500 bills, while a large model may hold several thousand. Another variety of bill changer is the belt coin changer. A belt coin changer has a barrel that holds quarters, nickels, dimes, and pennies and disperses them as change to customers. This allows for greater speed and accuracy at the checkout line. Bill to bill exchangers can convert high denominations of bills to lower ones. For instance, you could insert a twenty-dollar bill and instead of receiving twenty dollars in quarters, you could get back four $5 bills. These bills can then be used in standard bill changers to get coins.