AKOAK Loud Sound RJ11 Telephone Ring Ringer Amplifier Telephone Answering Accessories for Landline Telephone

The Telephone Sound Amplifier can give out clear and loud sound and it can be used in the noisy places.
Volume: 75dB.
Size:9.3cm long ( at the longest ), 5.6cm wide ( at the widest ), 2.7cm thick. ( at the thickest ).
This portable Telephone Ringer goes between your telephone set and the wall phone line to boost the volume of the ring.
It helps the hearing-impaired, the heavy sleepers, and people who love wandering far from their phones.