Used BOSS CE-1 Chorus Ensemble Chorus Vibrato, made between 1980 and 1981. This is a used BOSS CE-1 Chorus Ensemble guitar effects pedal. It is in used condition. Contents: Main unit only. There are small scratches and dirt. Minor rust and dullness on metal parts. Sound output has been confirmed. The CE-1, which extracted and unitized the chorus/vibrato section of Roland's super-standard guitar amp Jazz Chorus, is BOSS's first effects unit equipped with an analog BBD circuit, and is the world's first chorus pedal. This unit is characterized by its unique chorus and vibrato sounds, but the sound character of the built-in preamp is also attractive, making it a still-popular model.