Discover the Deftun MSR90, a hand-swipe-operated magnetic card reader with a USB interface, perfect for POS systems. Learn how to set up and troubleshoot the MSR90 effortlessly and streamline gift card management with eatOS integration. Simplify card reloading, refilling, and balance checks with this plug-and-play solution. https://support.eatos.com/en-us/article/getting-started-deftun-msr90-usb-card-reader-hfrbx6/