Ceiling speaker for surface mounting with power rating of 10 W (selectable to 10, 6, 3 and 1.5 W), 100 V line. 6.5" speaker. Complies with voice alarm norms, BS-5839 and EN54. Frequency response of 230-24.000 Hz. Sensitivity 103 dB and SPL max 112 dB (1 m, 1 kHz). Dimensions 170 mm (Ø) x 75 mm (depth). Steel, white colour (RAL 9010).