Seamlessly add as many as 4 Amplicom PowerTel601 shakers to any Amplicom PowerTel telephone. Each cordless phone can support up to 4 wrist shakers or expandable handsets. The emergency function is only compatible with the PowerTel 680.
Clarity HA40 In-Line Telephone Amplifier
ClearSounds ClearBlue Bluetooth TV/Audio Listening System
ClearSounds CR200 ClearRing Amplified Telephone Ring Strobe Signaler
ClearSounds CSC600ER Telephone SOS Pendant