Telephone Siren General Use BS-500 with Volume Adjuster 40-105dB 220-240VAC 921500000
Telephone electronic sounder is connected to the telephone line in parallel and gives us a strong sound signal when there is a call. It is used everywhere there is a noisy environment and a telephone call is impossible to be heard(e.g. factories, laboratories etc). Installation and connection of BS-500 is described bellow.