Ceiling speaker with power rating of 6 W (selectable to 3 and 1.5 W), 100 V line. 6.5" speaker. Complies with voice alarm norms, BS-5839 and EN54. Frequency response of 130-20.000 Hz. Sensitivity 94 dB (1 W, 1 m and 1 kHz). Maximum sound pressure level 102 dB (6 W, 1 m and 1 kHz). Flush mounting, quick spring-type system. Dimensions 220 mm (Ø) x 96 mm (depth), ceiling mounting hole 200 mm Ø. Metallic grille, white colour (RAL 9010), and red colour metallic rear box.