Videx 512A extension sounder for tone call systems

Extension sounder houses a forty five Ohm speaker within a hard ABS plastic case. This extension sounder houses a fourty five Ohm speaker within a hard ABS plastic case. The device 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. Please note: This device can only be used with electronic call tone intercom phones.