The BS-527/WP/V2 is one of the indication means of the fire detection panel. In case of activation, it produces a sound signal with the use of the internal buzzer and an optical signal by lighting (blinking) the led strip on the front side. So with these actions the public notice the sort of the danger. It cooperates with the following fire detection panels (BS-116, BS-632, BS-633, BS-634 and BS-636)