Here's what Mooer says about the E7 Mini Synth Pedal:
E7 is the Mooer polyphonic guitar synth pedal, the second pedal of Mooer's new Micro Series. Mooer have added 7 LED indicators on the right side of the shell, providing more possibilities to the new Micro series. E7 can transform your guitar into a typical electronic synthesizer, without the need for special pickups or instrument modifications.
It is named as E7, for its seven different Mooer custom synthesizer tones. Each tone has an individual arpeggiator, high/low frequency cut, attack, speed function, allowing users to shape the tone easily. Explore the horizons of tone with the E7!