The Sony WM-B 10 is a portable cassette player that was released in the 1980s and is part of Sony's Walkman series. This model is designed for easy portability, making it suitable for users who enjoy listening to music on the go. It features a compact and lightweight design, which is typical for cassette players of that era. The WM-B 10 includes a built-in speaker, allowing for playback without the need for headphones. It is equipped with a standard 3.5 mm headphone jack for private listening. The player has basic controls for play, stop, rewind, fast forward, and pause, as well as a mechanical volume control. The device operates on AA batteries, offering a decent battery life ideal for extended use during travel or outdoor activities. The WM-B 10 was appreciated for its straightforward usability and practical features, catering to a wide range of consumers looking for a reliable cassette player.