No manual available, but it is an amplifier with 4 independent outputs, can also be used as a bridge for high power, or BASS.
Tested in working condition with full load, works fine.
Attention! it needs to be installed with 4-8 ohm speakers
Dimensions: width 255mm, length 330mm, height 55mm
Total power: 2000W
Tested at maximum volume, works smoothly, sound quality is stable.
Used, tested, it's ok