Pre-amplifier  with kalaoke
output level : 9.0V(RMS)
S/N:more than 90dB
Separation: morethan 60dB
Bass adjust :+/_10dB
Treble adjust :+/-10dB
Sub-bass 45-60HZ
With echo
2 way MIC input
Package Size: 23W*14.5L*4.5H(cm)