The Elgin I9 (USB) is likely a device from Elgin, a company that manufactures various types of peripherals, including barcode scanners, printers, and POS (Point-of-Sale) devices. While Elgin I9 could refer to several different product types, it's most commonly associated with barcode scanners or receipt printers that connect via USB.
The Windows driver for the Elgin I9 USB device is software that enables the operating system to communicate with and operate the device. For a barcode scanner, this driver would help Windows recognize the scanner when it is plugged into a USB port, allowing you to scan barcodes and interact with your POS or other software applications.