ABS horn diffuser with 1.5" dome compression driver. 30 W (100V) transformer. Selectable power 30-15-7.5-3.75W. Frequency response 340 Hz - 9000 Hz; Sound pressure: max SPL @1m: 117dB; max SPL @4m: 105dB; sensitivity 104dB; coverage angle: 135°. ABS body and steel U-bracket. Ceramic inlet and outlet connectors with thermal protection fuse. Material: ABS; Protection rating: IP66; colour: Grey Dimensions: Depth: 280mm; Diameter: 212 mm. Weight 2.0 kg. EN 54 -24 Certification 1488-CPR-0652/W.