Uxcell Telephone Ring Ringer Loud Sound RJ11 Amplifier 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 ) Weight: 41g Package only included one ringer, no another cables included