ANLEONMTG-200 wireless tour guide language interpretation system Simultaneous translation Guided tour groups (4 Receivers)

Can i unplug the microphone of the transmitter and plug a 1/8" plug cable to transmit from a device? Thanks

Will these mtg-200 receivers work with the mtg-100 transmitters?

can all receivers be next to each other? (is there interference from proximity of receivers)

What other type of hearing device do you have (other than earbuds)? Some people do not like to stick anything in the ears. Please recommend options. T