The Sony TC-K315 is a cassette tape player manufactured by Sony Corporation. It belongs to the Walkman series of portable personal stereos and was produced in the 1980s. The K315 model offers basic tape playback features such as pause, reverse, and record, as well as a switching selector for FM radio reception. The original price for the Sony TC-K315 was around $70. Today, it is considered a vintage and collectible item for audiophiles and music enthusiasts.