1.teaching pa amplifier 2.power:2*200W 3.DC 6V battery power,echo 4.ISO 9001,FCC,CE,Rohs 5.transistor:3035 Economy Power Amplifier Function:1. The multimedia teaching audio power amplifier is simple operation and high sensitivity.2. With three microphone input jack (6.35mm) and independent volume adjustment,3. With reverberation, four line audio input, a line audio output.(RCA)4.It can ...