The Aiwa HS-PX101 is a portable cassette player that was released in the late 1980s. It features a compact design and was popular for its durability and sound quality. The player includes features like auto-reverse, Dolby noise reduction, and a digital tuner for AM/FM radio. It also has a headphone jack and a built-in speaker. The HS-PX101 runs on batteries and can play standard cassette tapes.