5" ceiling mounted false ceiling acoustic diffuser with 6W (100V) transformer. Selectable power 6-3-1.5W. Frequency response 130 Hz - 15000 Hz; Sound pressure: max SPL @1m: 100dB; max SPL @4m: 88 dB; sensitivity 92 dB; coverage angle: 130°. Ceramic inlet and outlet connectors with thermal protection fuse. Materials: metal; colour: White - RAL 9016. Dimensions: Depth: 143mm; Flush depth: 125mm; Diameter: 181mm; Flush hole: 155 mm. Weight 1.35 kg. EN 54 -24 Certification 0068-CPR-051/2017.