Home / FHF / Communications Equipment / Telephones Accessories / Secondary Ringer / Second Telephone Alarm and Signal Unit TWIN-EExII Type 5842/1 Second Telephone Alarm and Signal Unit TWIN-EExII Type 5842/1 https://www.fhf.de/index.php?pid=45767&lid=4 Category: Secondary Ringer Related products Explosionproof Telephone Secondary Bell Read more Second Telephone Alarm and Signal Unit Twin EExII Typ 5842/1 GOST approval Read more Weatherproof Telephone Secondary Bell Read more Second Telephone Alarm and Signal Unit Twin EExII Typ 5842/1 Read more