5" plastic ceiling-mounted acoustic diffuser with 6W (100V) transformer. Selectable power 6-3-1.5W. Frequency response 130 Hz - 15000 Hz; Sound pressure: max SPL @1m: 101dB; max SPL @4m: 89dB; sensitivity 93dB; coverage angle: 165°. Ceramic inlet and outlet connectors with thermal protection fuse. Material: plastic with metal grid; colour: White - RAL 9016. Dimensions: Depth: 71mm; Flush depth: 66mm; Diameter: 175mm; Flush hole: 149 mm. Weight 0.66 kg. EN 54 -24 Certification 0068-CPR-051/2017.