The Destination Rotation Single is 100% analog and low noise. The doppler effect is tight and the phasing characteristics are liquid sounding. The DRSingle is 100% hand-built and thoroughly tested before it leaves my hands. It is built like a tank with high quality components all lead (Pb) free soldered to a carefully designed and super-solid double sided plate-through PC board that is also Pb free. All that is housed in a die-cast aluminum box that will not rust or fall apart. As with all Option 5 products the DR Single is built to last! FEATURES INCLUDE All analog circuitry. Smooth switchable overdrive feature. Top side trimmers for slow/fast speed tweaking. Mic placement control for effect depth. Realistic speed up/down ramping effect. Standard 9 volt operation. Low profile box. True Bypass. RoHS compliant.