The Braun KH 500 is a model of stereo headphones designed by Dieter Rams, produced in Germany between 1976 and 1981. This model features a striking black color and is noted for its rarity in the collector's market. The headphones were originally priced around 100 DM. The KH 500 is part of a series that includes various other Braun audio products, showcasing a clean, functional design characteristic of Rams' aesthetic.