Viking 15 Watt Paging Amplifier and Loud Ringer (PA-15)
600 ohm output to drive additional amplifiers
Algo 1825PM Duet Plus Analog Loud Ringer & Paging Amplifier
Interfaces easily with optional Algo 1186 Horn Speaker to provide increased ringing or voice notification volume (up to 112 dBA SPL at 1m (3.3ft.))
Telephone Ringer Amplifier by Connected Essentials
Loud Ringer with Bright Flashing Light
COMPACT DESIGN - Dimensions 3.1x2.4x0.98in (80x60x25mm)
Sscon Telephone Ringer Amplifier Socket Lound Telephone Ring Speaker for Landline Telephone
Package Includes: 1 x Telephone Ringer Amplifier
RadioShack Radio Shack Mechanical Ringer Amplifier
Pulls enough power from the phone line to provide a 65-75 dB ring.
Viking PA-2A Paging
Loud Ringer Amplifier (includes 25AE horn)
The unit comes complete with a power supply, amplifier, and (1) Viking 25AE paging horn
discoGoods 2 Pack Socket Loud Telephone Ring Speaker Bell Ringer and Ringtone Amplifier 95db Volume Enhancer for Landline Telephone With Flashing Light
On and off switch on the side of the ringer. Easy to control of the ringer sound.
Woods Telephone Bell Ringer Amplifier Unit
Perfect for the garage, patio, workshop, basement, laundry room
Woods Telephone Bell Ringer Amplifier 0934
Easy to install
Funien Loud Sound
RJ11 Loud Sound Telephone Ring Amplifier Ringer Landline Phone Bell Ringer for The Old Elder Noisy Places
Need another adapter for UK buyers or others.