Addressable sounder with transparent flash and built-in isolator. Max consumption: 14.7mA. Max sound output 97dBA +/- 3dB @ 1m. Strobe flash frequency: 1Hz. It has 32 tones and 3 volume levels (high, medium and low) selectable by microswitches. It connects directly feeds the loop occupying an address from 0 to 99 of the control module. Requires base B501AP-IV, BRR or WRR.