I would like to have a wired mic to speaker system. Mic to pick up sound in a 30 sq. ft. area to be received in a speaker in another room, 120 ft. away. Mic in church sanctuary. Speaker in nursery. Is there a built-in speaker/amplifier unit? How about the speaker with headphone plug-in to squelch the speaker sound in the nursery? How about a blue tooth headphone to enable walk-around area in nursery?