Output Type:LINE OUT (AUDIO OUT)
Recommended Headphone Maximum Impedance:<32 Ohm
Input Type:LINE IN (AUDIO IN)
Built-in :No
Grey Loud Telephone Ring Amplifier RJ11 RingerVolume: 75dB; Size: 9.3cm long ( at the longest ), 5.6cm wide ( at the widest ), 2.7cm thick. ( at the thickest ); Weight: 41g; 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.