Works to Perfection
Bought this ringer to replace a frequency ringer that was originally installed in my AE50 Monophone. Now, the phone rings perfectly (and loudly!) on our 20 Hz home phone line. The condition of the new ringer is what I would describe as NOS (new old stock) and it was an easy drop-in fit. Although somewhat expensive, the quality and perfect function warrant the cost, in my opinion.