The external audio unit for Agility™ is a useful accessory that allows you to place the Speech / Listening function in a different position than the location of the same station. The external audio unit is used as a replacement for the audio functionality of the main unit. It can be placed in a place within the installation and different from the location of the central system, near where the user usually makes his life. It has been found that this is particularly beneficial for the care of the elderly, allowing bidirectional communication with users in times of emergency.