Small push button to turn it on with red led startup. Auxiliary input + headphones, a wheel "gain"
A wheel "tone"
A wheel "volume"
all three graduated 1 10.

UTILIZATION

Nothing simpler. With the "gain" on its saturation module.

SOUND QUALITY

I try to play a little Metallica, to Maiden, AC / DC, with my headphones philips SBCHL 145. Super sound.

OVERALL OPINION

Trs satisfied with this little device.
Enjoyable surprise.
A bit too expensive.