The Sony WM-DD 100 Boodo Khan is a portable cassette player introduced by Sony in the early 1980s. It features a dual capstan design, which helps in providing stable tape motion and improved sound quality. The model is characterized by its sleek and compact design, making it a popular choice for music enthusiasts who desired portability. The Boodo Khan version is often recognized for its unique styling and color scheme. It is considered a collectible item among vintage audio equipment enthusiasts.