Volume: 75dB
Size: 9.3cm long ( at the longest ), 5.6cm wide ( at the widest ), 2.7cm thick. ( at the thickest )
Weight: 205g
Need another adapter for UK buyers or others
Installation: Connect the c/o line plug with ringer's jack,the Grey Ringer's plug connect with telephone.

This portable Telephone Ringer goes between your telephone set and the wall phone line to boost the volume of the ring The Telephone Ringer wonders in pronouncing incoming calls particularly in noisy places It helps the hearing-impaired, the heavy sleepers, and people who wandering far from their phones.
Color: Grey
Material: plastic

Package Content : 5 x Telephone Ring Amplifier