Volume pedal and tone, analog.
The connection is simple: An input, output, and an output bypass to connect a tuner or other non-standard configuration (or even bi-amplification with / without effect for the recording studio.
No need for power is the liability

UTILIZATION

Configuration is very simple: NOTHING IS SET! You plug, you play! It's plug'n'play.
You lean forward to increase the volume, backward to decrease, you turn left to go to the grave, to the right to go to the treble.
The manual ... What for?
The pedal is solid, that's great, a little space, so it is better to provide space in the pedal board

SOUND QUALITY

The effects are effective, even if we would have liked a broader tone of race, but it still allows for very nice effects, and it can correct a small problem of the presence or excessive treble.
I use it with several guitars.
Before, I put a wah-wah and distortion pedal.
After, I put a compressor (some advocate before the distortion, but the sound I'm looking for is after the comp).
The delay is in effect loop, so my repitition are not cut through the volume pedal.
It is very transparent, without breath, without cracking, the increase in volume and tone is steady. In short, that's good!

OVERALL OPINION

I use it for 3 months:

What I like most:
- Solid
- Transparent
- Increased noise due
- The output tuner sound

What I like least:
- The frequency of pitch correction rather narrow
- The size large enough.

I have not tried other models before buying.
I consider the RAPORT price / quality good.

With experience, it is a choice I would do, it makes the job much to do and it is solid.