POS hardware is all the input and output devices that make the point of sale software function at the point of purchase. When POS software companies develop software, they engineer it to work with specific hardware components and communication protocols.
For small-ticket items such as cash drawers, barcode scanners, or receipt printers, you can expect to pay $100 - $400 per device. A touchscreen monitor or tablet will set you back an additional $200 - $600 per unit.