Another example of Arion low noise technology is the SFL-1. By using 4 controls, the Arion Stereo Flanger offers a greater variation of sounds than many competing flanger effects. SPECIFICATION Power Requirements :Battery DC9V(6F22/006P)AC Adapter DC9VConsumption current :DC9V 16mAInput impedance :240MOutput impedance :10K or moreControls :Depth, Manual, FeedbackDimensions :73W x 50H x 127DmmWeight :330grm (including battery)