Level connections, it has one input and two outputs A and B, taking over for tranfo, which also comes with silent, the pedals do not work with batteries.
The rglages are "EFFECT LEVEL" to assay the level of rverb, "PRE EQ" for the color of the effect (more or less acute, in fact), "TIME" for the length of the r verb, and "MODE" which allows accder to six programs included: ROOM (rverb short and brilliant), HALL 1, HALL 2 (longer), PLATE (rverb colors diffrent ), DELAY (not great but can dpanner), GATE (rverb INTERESTED gate for effects).
Apart from the delay, contrlable difficult (but a rverb pedals of all APRS), all the presets are good quality sound and provide ample expected. And when you plug everything in Stereo (but you have two amps!) Is carrment bluffing.
In short, it's a good little machine, with me for over 10 years and still works perfectly, which dmontre the reliability of the Boss pedals.