The correct answer is barcode reader.A barcode reader is a device used in stores to directly read universal production code printed on each product sold.It is an input device.It's an optical scanner that can read printed barcodes, decode the data, and communicate the information to a computer.A barcode system consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals.Barcodes are frequently used to help organise and index information or prices about a particular item.Additional InformationA printer is a computer device that creates a permanent representation of visuals or text, typically on paper.The printer is an output device.A spy camera is a still or video camera that is used to secretly record individuals.A laser is an optical amplification device that emits light by the stimulated emission of electromagnetic radiation.