Vintage Microsoft Trackball Optical 1.0 USB Wired Mouse 5-Button PS/2 Ergonomic

Brand: Microsoft Model: Trackball Optical 1.0 (PS/2/USB compatible) Type: Wired trackball mouse with right-hand ergonomic shape and red optical trackball. Olive green. Controls: Left/right click, scroll wheel, plus two side buttons (5-button layout) Connection: USB-A cable; PS/2 support requires an adapter (adapter not included) Power rating on base: 5V 100mA Visible markings: Microsoft hologram; CE and FCC marks; UL Listed Accessory ITE 78CJ Identifiers on base: PN X08-70386; Product ID 52240-576; Code 4083596-00000; 3892A343 Country of manufacture: Made in China Includes: trackball mouse with attached USB cable only—no adapters, software, or original box Notes: Label reads "Trackball Optical 1.0 PS2/USB Compatible"; cable features a ferrite core