? 6 channels equilibrium input (PHONE JACK),the gain can adjust individually, with phantom power, as MIC input and line input. ? 1 channel priority microphone input (PHONE JACK), with phantom power. ? Integrated excellent performance of MP3 function: (1) 128MB memory, to play Mp3,WMA etc audio files. (2) to external connect USB equipments (such as Mobile Disk, U Disk etc) and play MP3,WMA etc audio files,as well copying the audio files into local memory. (3) Simple night LCD panel, setting the durable soft-touch key, intuition and easy to operate. (4) Complete audio play modes: single to play, single to repeat play, in order to play, in order to repeat play, disorder to play, program to play(programing 200 points of timing and positional programs), suitable for different occasions to use. (5) Long time to record and monitor: recording present voices on the playing time or voices of microphone, convenient to record at the meeting or as alarm sound sources to use. (6) Built-in electronic volume controllor, long life and more stable. (7) Built-in rings and ring selection, optional to use, more flexible to be applied to different occasions.