Vintage Microsoft Easyball Children’s Mouse Version 1.0This vintage Microsoft Easyball Children's Mouse Version 1.0 is a unique input device for your computer. It boasts a trackball design with a single button for easy and accurate navigation. The multicolor design adds a fun touch to any computer setup.It connects to your computer via a 9 pin serial port and is compatible with various operating systems. This mouse is perfect for collectors or those looking for a retro touch to their computer setup.