Audio kit with flush-mounting external unit with one bell push button, a power supply and internal unit with receiver, pre-programmed

This two-wire audio kit includes a flush-mounting external unit with one push-button doorbell, an internal unit with receiver and a power supply module. The kit is pre-programmed so that all you have to do is connect it! The microphone and loudspeaker on the external unit are adjustable. The external unit is equipped with an illuminated text field for personalisation. The ring tone volume can be adjusted or switched off on the internal unit. The classic receiver is used to communicate with the visitor. The door lock can be directly connected to the power supply. The set can be expanded with an internal audio unit (type 10-505 or 10-525), an external audio unit and a relay 10-831 for controlling an extra gate or enclosure.