The EHX Key 9 comes with just enough buttons and inputs, you don’t feel overwhelmed when faced with all the control dials. The operation of the pedal is also very easy and straightforward; you get a dry and a wet volume and two control dials. Usually Ctrl 1 is for the intensity of the effect, Ctrl 2 is to determine the speed. Last but not least there’s the voicing dial with 9 sounds to choose from (hence the name). The pedal comes with a DC adapter, it uses 9 volts like most other pedals, so it won’t be too much of a hassle to put on your pedalboard.