The Sony ST-S 700 ES is a high-performance tuner manufactured by Sony from 1987 to 1989 in Japan. It features a sleek black design and was originally priced at approximately 898 DM. This model is part of a series that includes other tuners such as the Sony ST-J 300 L, ST-S 500 ES, ST-S 800 ES, and ST-V 710. The ST-S 700 ES is designed for superior signal reception and sound quality, making it a suitable choice for users looking for an excellent tuning experience.