The Rogue Analog Chorus pedal creates modulation effects, from wide sweeping to shimmering 12-string sound. It adds depth to electric guitars, electronic keyboards and more. Two control knobs let you quickly adjust the modulation speed and depth. A true bypass switch engages and disengages the effect. An LED indicator shows you when the effect is engaged and gets dim when it"s time to change the battery. The Rogue Analog Chorus pedal is made of aluminum and built to last.Sturdy, lightweight aluminum case True bypass switching Easy-to-use Rate and depth controls Powered by either a 9 volt battery or external 9 volt DC adapter