Get the sound that made the Classic 1970 Small Stone famous! The EHX Small Stone Phase Shifter generates thick sweeping phase shifting with liquid transparency. Feedback color control adds a tingling swirl. Blues players dig the Stone’s rapid rotating speaker effect. Country players add tasty seasoning to their chicken pickin’. Metal-heads dig its jet plane swoosh. Variable rate control allows slow and smooth to rapid edge frequency sweeps Color switch turns up the feedback for a more pronounced phase shifter effects Tough and compact die-cast chassis 9V battery included