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This wireless extra ringer amplifies the ring signal + 90dB and gives light flashes when your phone rings, so you never miss a call.
You can expand it with the Swissvoice Doorbell 8155
You can place it anywhere in the house.
Open fitting (thin tube), RIC
cap, open large ø 10mm, open medium ø 8mm, open small ø 6mm, power dome large, power dome medium, power dome small, vented large ø 10mm, vented medium ø 8mm, vented small ø 6mm
(these domes are suitable for the Phonak speaker 4.0)