Sound quality design based on the latest acoustic engineering and psychological research results. The new entry level model which final proposed in the hopes that listeners will find audio more interesting comes equipped with a one-button controller that incorporates a microphone. E1000C sound quality is clear and well-balanced, from low through to high tones, and achieved a realistic sound spread much like you are listening to live music. E1000C, the new entry level model that final proposes in the hope that buyers will choose it as their first full-fledged earphone set, are equipped with a one-button controller that incorporates a microphone.