Vintage Digital Research Technologies Ergo 3-Button Serial-PS/2 Trackball, Model DRTRACKE.

This is the original retail box for the Ergo trackball featuring a built-in wristrest, green trackball, thumb button + two finger buttons, programmable third button, special window lock button, and opto-mechanical technology. Specs from the box include up to 4000dpi dynamic resolution, rugged tactile click micro-switch keys, easy-to-clean rollers with removable ball, and compatibility with Serial or PS/2 ports. Microsoft Windows Win95 compatible.

Condition notes: Box shows typical age/shelf wear (scuffs, minor edge wear, light creasing). Item is sold as pictured; please review all photos carefully. Untested for function (standard for vintage input devices of this era). Includes original packaging as shown.

Perfect for retro computing collectors, Win95/DOS setups, or anyone wanting a classic ergonomic trackball with wrist support.

Ships carefully packed. Questions welcome.

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