Microsoft Serial Mouse 2.0, also known as the "kidney" mouse, which was released around 1993. It was a common accessory for PCs running Windows 3.1 or Windows 95.
Design: The mouse is beige with a distinctive curved, ergonomic shape that earned it the nickname "kidney" mouse.
Connectivity: This model was primarily a serial mouse, which connected to a computer's 9-pin DE-9 or 25-pin DB-25 serial port. Some packages also included a PS/2 adapter, making it compatible with both serial and PS/2 ports.
Tracking: It used a mechanical rollerball for tracking movement.
Buttons: It featured two buttons, left and right, but did not have a scroll wheel, which was a later innovation for Microsoft mice.
Functionality: The mouse was designed for use with Microsoft's IntelliPoint software, which allowed for customization of its buttons.
Comes with original box, original guide, and original pc novice mail advertisement
Tested (Works)
Note: Must install mouse into serial port before turning on device for mouse to function