The Sony TPS-L2 was the first model in Sony's Walkman series, launched in 1979. This portable cassette player was revolutionary for its time, allowing users to enjoy music on the go. It featured a compact design, consisting of a durable plastic casing and a notable blue exterior. The TPS-L2 included a headphone jack, and its functionality was geared towards playback of cassette tapes, with the capability to utilize standard AA batteries for power. The sound quality was respectable for its time, and it became a cultural icon as personal music players gained popularity. The device was instrumental in changing the way people listened to music. Its introduction also paved the way for advancements in portable audio technology, leading to subsequent models and innovations. Specification-wise, it weighed approximately 400 grams and offered a playback time of around 6 hours on a set of batteries. The TPS-L2 included a built-in speaker for shared listening and an indicator that showed tape movement. Accessibility to volume control as well as a play/stop button were essential features integrated into the design, contributing to the overall user experience.