2N® IP Solo Door Compact Door Intercom Unit - Audio Only, Surface Mount, nickel The 2N 9155301S IP Solo is a stylish and compact Door Intercom unit. This is an audio-only version (no camera) of the IP Solo and features a single call button. The 9155301S is manufactured as a stand-alone IP-connected intercom unit and includes built-in microphone, 1 call button and 1 surface-mount frame. https://elecena.pl/product/21018468/9155301s-audio-door-intercom 2022-06-16 https://elecena.pl/product/21018468/9155301s-audio-door-intercom 2023-02-15