1)How many Microphones does the EXPAND 80 have?

The Expand 80 got 6 Microphones with 100-7.500 Hz. Using Beamforming microphones creating 360 degrees around the unit.

2) What way of connection can be used with the EXPAND 80?

The EXPAND 80 has Bluetooth, NFC and USB-C Connection. It does not contain connection via Jack.

3) What is the optimal Microphone distance using the EPOS 80?

The optimal distance is within a radius of 2.3m.