Horn speaker with power rating of 30 W (selectable to 30, 20, 10 and 5 W), 100 V line. Complies with voice alarm norms, BS-5839 part. 8 and EN 54-24. Connection of low impedance 20 ohms. Frequency response of 592 - 6.900 Hz. Sensitivity 110 dB (1 W, 1 m and 1 kHz). Maximum sound pressure level 125 dB (30 W, 1 m and 1 kHz). Made in UL94V0 ABS, steel bracket, suitable for outdoor (IP-66).