Strymon ZelZah Dual Phaser- Effects Pedal for Electric Guitar- Two completely independent phasers which can run separately: in series, in parallel or split- one 6-stage with continuous range from phasing to flanging to chorus, all with adjustable resonance and one 4-stage phaser with 3 sweep modes: Classic (traditional rise-and-fall LFO with voicings that change in character as the DEPTH knob is adjusted) barber (constantly rising LFO with +ve or -ve polarity) and envelope (touch sensitive env. phasing), independently accessible via their own footswitch and set of controls- ‘Voice’ control morphs between phasing and flanging/chorus- EXP/MIDI: Connect a Strymon MiniSwitch (not included) for remote selection of a favorite setting, a Strymon MultiSwitch Plus - not included for access to 3 presets, or a MIDI controller to either a Strymon Conduit - not included or a Strymon MIDI EXP cable (not included) for access to 300 preset locations- Controls: 6-Stage: Speed, Depth, Voice - 4-Stage: Speed, Depth, Mix- Push Buttons: 0- Switches: Input Mono/Stereo, 6-Stage: Resonance - 4-Stage: Sweep- LED: 6-Stage On, 4-Stage On- Footswitches: 6-Stage Bypass, 4-Stage Bypass- Connections: Mono/Stereo Input (1/4" TRS-Jack), Mono/Stereo Output (2 x 1/4" Jack), EXP In (1/4" TRS-Jack)- Power Supply connector: Barrel Connector 5.5 x 2.1 mm, center negative- powered by a 9 V DC Power Supply (included)- True Bypass- Dimensions (W x D x H): 178 x 114 x 44 mm (7" x 4,5" x 1,75")- Made in USA- Note: Battery operation is not supported