question and needed info



first power source ,,has input and labeled with voltage and amprege,, need to know the poliarity setup as not to burn any thing up if using a generic pwr adaptor,,or a recomeneded pwr adapter to take the guessig out

second mic impedience , saw no info in teck manual and need more info to make a proper choice to use with U M C P mic set up
third the shift button what is it purpose, i think its to give a alternate comand function to some of the controls,,, will look again in the user manual,,some dumb


thinking about getting a headset with mic attached, what are the possibilities

