The Sony WM-EX672 is a compact cassette player released in the late 1990s, designed to provide a blend of portability and sound quality in a lightweight format. It features a metal tape mechanism that enhances playback fidelity, making it suitable for various audio formats. The player is equipped with Dolby Noise Reduction, which reduces tape hiss and improves the listening experience in noisy environments. One of its standout features is the 'Ultra Bass' system that enhances lower frequencies for a fuller sound. The device is powered by two AA batteries, which contribute to its lightweight design and extended playback time. Additionally, the WM-EX672 has a sleek and ergonomic design, often noted for its appealing aesthetics and durability. The buttons are user-friendly, and the unit typically includes a headphone jack for direct listening. Some versions may come with a remote control option for added convenience. The casing typically features a combination of plastic shell with metal components, offering durability and style.