Vintage Qtronix 3-button Mouse serial 9-pin connector Lynx-30s - w/ Box & Floppy For Sale
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This is a vintage Qtronix trackball mouse with a serial 9-pin connector called Lynx-30s. It has three buttons and comes with its original box and floppy disk. The brand is Qtronix, and it falls under the category of computer peripherals, specifically mice, trackballs, and touchpads.
