Legrand Telephone Ring Amplifier, 230 V ac, 50 → 90dB at 1 m, IP31, AC

Ringer for noisy locations and rooms receiving people with impaired hearing.
Connects to standard-certified or France Télécom-certified lines (analogue network).
230 Vac power supply – 50 / 60 Hz.
Multi-voltage telephone network, 25 to 120 Vac, 15 to 60 Hz.
Choice of 3 immediate or delayed sounds (5 seconds) for the telephone ringer.
Adjustable volume from 50 to 90 dBA ±5 dBA at 1 metre.
Power consumption: 20 mA.
Equipped with flashing, long-life LED indicator lights (100,000 hours).