The Vintage Microsoft Intellimouse Trackball, PN 96483 63618-577, is a PS/2 compatible mouse featuring an ergonomic design. Sourced from Mexico, this trackball mouse has a unique 2-button layout and is ideal for users looking for a classic and reliable pointing device from a trusted brand like Microsoft. Its compact size and comfortable grip make it a great choice for those who prefer a trackball over a traditional mouse.