The Sony WM-GX90 is a portable cassette recorder that represents a blend of compact design and functional features, aimed at music enthusiasts and casual listeners alike. It supports both normal and metal tapes, providing versatility in audio playback. With automatic tape selection, it detects the type of cassette inserted and adjusts bias and EQ settings accordingly for optimal sound quality. The device boasts a built-in microphone for recording capabilities, making it ideal for capturing notes, lectures, or personal moments. Additionally, the WM-GX90 features a headphone output for private listening and a built-in speaker for on-the-go playback. It is equipped with Dolby B noise reduction to minimize background hiss, enhancing the overall audio experience. The device is powered by AA batteries, allowing for portability and ease of use. The compact size and lightweight design make it convenient for users who enjoy music and recordings while traveling or in everyday situations.