Apartment Stations 
The Urmet Duo hands-free system can be used to send a call from a panel to an apartment station speaker, establish a two-way conversation, open the electric lock and operate a supplementary control (e.g. switch the staircase lights on).
The device can be used in systems with up to 2 automatically switching loudspeaking units.
An optional conversation privacy function is available in systems with only one loudspeaking unit (an additional wire is required in the column for this function).
