Annunciator With inbuilt Hooter Speaker Invisible

We design & manufacture Microcontroller based Annunciator with inbuilt hooter (Speaker and other related circuits mounted inside the unit) from 2 windows to 64 windows with both Big window unit and small window unit & combination of Big & small window units in moulded box with Wide Aux. supply range, Standby working with AC supply, DC Fail Indication, Ac Fail Indication, RS 485 communication and Repeat relay contacts.