... 1.equalizer amplifier,9v 2.mini stereo power amplifier 3.Golden yellow aluminium materia Golden mini stereo power sound equalizer Amplifier SD1099 User ... is provided with 3.5earphone interface, volume gain knob, power switch and an indicating lamp,channel selection in close proximity ... to the knob.Back with PRE-OUT and 2 group INPUT interface, a power input to 9V. Maximum input ...