RJ11 Loud Sound Telephone Ring Amplifier Ringer

Features:
Volume: 75dB; Weight: 41g.
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.
The RJ11 Telephone Ringer can be used in the noisy places. It helps the hearing-impaired, the heavy sleepers, and people who love wandering far from their phones.
Need another adapter for UK buyers or others.