Videx 512E extension sounder for 12 V AC buzzer

Extension sounder houses a built-in tone generator which will create a call tone. This extension sounder houses a built-in tone generator which will create a call tone and must be connected to an audio handset in order to function correctly. Extension sounders are a useful addition to an audio entry system where the property has multiple rooms, or when the original device does not have sufficient ring tone volume.