Acoustic projector with power rating of 10 W (selectable to 10, 6, 5 and 1.5 W) in 100 V line. Complies with voice alarm norms, BS-5839 part. 8 and EN 54-24. Bidirectional, with 2 x 6.5" speaker. Frequency response of 237 - 12,400 Hz. Sensitivity 96 dB (1 W, 1 m and 1 kHz). Maximum sound pressure level 106 dB (10 W, 1 m and 1 kHz). Cylindrical enclosure and grille in aluminium, white (RAL9010). Suitable for outdoor (IP-66).