The BOSS EV-20 is a pedal designed for voice.
It is equipped with an input combo jack / XLR and two XLR outputs, the latter being adjustable in "Dry" Convenient to avoid feedback.
effects are:
Reverb, Delay, Distortion, and radio, Gater, Flanger, double.
It can also make harmonies that can replace some vocals and also has a looper to 38 seconds.
The whole is preceded by a compressor and a low cut ...

For the rest: look at the site of BOSS.

It is metal and very solid.

UTILIZATION

The VE-20 is very intuitive, very easy to adjust: 3 shots in 2 wheel and push, you have a good presets you!
Also in case of hardship, you still have the manual that is well detailed.

SOUND QUALITY

The effects are very well done and good for stop adjustable qualité.Les harmonies when it was not obvious except on a set of simple pieces (style 4 chords)
The effects in general are very good (thank you specialist Boss pedal)

OVERALL OPINION

Most:
_the sound (quality effects, outings etc ...)
_the output "dry"
_the right pedal has adjustable wish
_the strength

the -:
_No yet found

I had the TC Electronic Voice Tone Correct Voice tone and create: it always falls down and the two together is less chance that the BOSS.

I would do the selection without any problems!