Philips telephone D130 three way hands free system, only used briefly.
Sound and Vision:Home Audio and HiFi Separates:Speakers and Subwoofers – Philips telephone D130 three way hands free system, only used briefly.
Telephone
2X(RJ11 Socket Loud Telephone Ring Speaker Ringtone Amplifier L6C3)
Sound and Vision:Home Audio and HiFi Separates:Amplifiers and Pre-Amps – 2X(RJ11 Socket Loud Telephone Ring Speaker Ringtone Amplifier L6C3)
E5Z8 Rj11 Socket Loud Telephone Ring Speaker Ringtone Amplifier L1G6
Sound and Vision:Home Audio and HiFi Separates:Amplifiers and Pre-Amps – E5Z8 Rj11 Socket Loud Telephone Ring Speaker Ringtone Amplifier L1G6