Microsoft Mouse 2.0A Ball Mouse (DB9) 1993 https://dazzlemonk.com/products/microsoft-mouse-20a-ball-mouse-db91993 Microsoft Mouse 2.0 (specifically the Serial version). Introduced in 1993, this iconic peripheral is widely known as the "Kidney Mouse" due to its distinctive curved, ergonomic shape. Today, these mice are often sought after by vintage computer enthusiasts and collectors.