Ceiling speaker 4” and 6 W power. Includes back box. Flush mounting, quick spring-type system. 100 V line connections for 1 W, 3 W and 6 W of power. Frequency response from 300 Hz to 18,000 Hz. Sensitivity 89 dB (1 W, 1 m). Dimensions 140 mm (diameter), 80 mm (depth). Ceiling mounting hole 125 mm Ø. Weight 0.83 Kg. ABS and metallic grille, white colour (RAL 9016). Protection degree IP66.