The WK 978 external bell is an additional weather-proof electromechanical signalling device for ringing current. It is used as an additional signalling device in telecommunications networks. - Weather-resistant external bell. - Two-tone ring, glass-fibre-reinforced - plastic housing with degree of protection IP43 - Volume: 85 db. - The external bell is an additional means of signalling an incoming call on a connection line and must be connected to the connection terminals on the TAE socket via a two-wire cable. - A separate power supply is not required. https://elecena.pl/product/18786302/60121-weather-proof-secondary-ring-tone-device 2021-06-13 https://elecena.pl/product/18786302/60121-weather-proof-secondary-ring-tone-device 2025-01-26