- What kind of amplification (lamp, transistor ,...)?:
transistor

- What is the power delivered?:
2 watts (but it is powerful for a 2 watts!)

- What connection?
a jack for the guitar, an MP3/CD input and headphone jack.

- What are the settings, the effects? ...
one tone knob, a knob effects (4 effects: chorus, flanger, phaser and tremolo), a knob delay / reverb to choose the side effect (delay or flanger to the combined chorus, flanger, etc. ...). Below is a selection knob amps (6 amps one more notch to micro), a gain knob and of course volume. Oh I forgot, a tune with the mail.
I put 9 for power

UTILIZATION

The configuration is fairly simple but regrets the lack of 3-band equalizer.
There is an amp for just about every style of play
1.ACOUSTIC: acoustic amp, I never ever used.
2.JC CLEAN: clean sound based on a JC-120 Roland Jazz Chrus. I use it often.
3.BLACK PANEL: a clean based on a Fender Twin Reverb.
4.BRIT COMBO: Vox AC-30TB (sound has the Beatles)
5.CLASSIC STACK Marshall JMP1987
6.R-FIER STACK: MESA BOOGIE RECTIFIER: the one I used most Since my style of play
7.MIC: This position is useful if you plug a microphone instead of a guitar. I do not EVER used.
I do not ever used the tuning fork.
I put 7 as it cruelly anqu equalizer.

SOUNDS

It is not really my style of music (hard rock, metal and death metal) but a good amp.
I play it with a Squier Bullet Start and an ESP LTD M-50.
We get good sounds with this amp I recommend it.

OVERALL OPINION

I use it for 2 months and I am satisfied.
I like the built-in effects.
I have tried a micro Line6 spider before buying and I preferred the Roland
The value is good for € 100 was Polivalente an amp but I do not recommend it if you play metal.
I remake this choice with the experience