The Sony WM-EX170 is a compact cassette player that was designed for portability and ease of use. It features a sleek, lightweight design that makes it convenient for users who enjoy listening to music on the go. This model is equipped with several features that enhance its functionality, including an auto-reverse mechanism that allows for uninterrupted playback of both sides of a cassette. The player also incorporates Dolby B noise reduction technology to improve sound clarity and reduce background noise. Additionally, it has a built-in headphone jack for personal listening and comes with a power-saving mechanism to extend battery life. The WM-EX170 is powered by two AA batteries, which is a common choice for portable devices of its time, and it offers a simple interface with basic playback controls. In terms of design, it typically features a compact form factor with a durable build that can withstand regular use. The device is compatible with standard audio cassettes and provides a nostalgic option for users who appreciate analog audio formats.