The Sonic Ringer Audible Telephone Signaler Model TR100 alerts you that your telephone is ringing by sounding a loud adjustable horn automatically. The TR100 can flash lights and sound horns in other rooms by use of remote receivers, (Models SA101, SA201, RH100, BL300, Sonic Boom Alarm Clock).
120V power source required
Please verify your country supports 120V power source.
This item has a standard US phone jack (RJ-11) connection. Please verify your countries telephone provider supports a standard US phone jack (RJ-11) connection. A phone adapter may be needed.