Welcome to All Music Inc, You are looking at a great piece. This is the Electro-Harmonix Nano Neo Mistress. EHX has been one of the biggest names in flangers for decades and it shows in the quality of this pedal. The rate and feedback controls allow easy control of your flanger tone. Low rate and higher feedback gives a nice fattened tone while higher rate and lower feedback produces a smooth, big flanger tone. The nano casing makes it super easy to fit on your pedalboard. True bypass also keeps your signal from degrading when the pedal is not engaged. We are an authorized Electro-Harmonix dealer. Don't pass this by.