EMMA TM-1 TransMorgrifier Compressor A compressor that incorporates all the best attributes of the classics while addressing their shortcomings. Included are controls for the adjustment of attack, release and ratio, allowing the user to custom tailor his/her sound to the job at hand. Country, rock, jazz or blues, this one's up to the task. 9v battery or 9v DC power supply required. Handmade in Denmark.