Completely-sealed, flush-mounted ceiling speaker made up of a high power handling, splash-proof, small full-range speaker employing a plastic film diaphragm. Its chemical-resistant grille makes the speaker ideal for use in clean rooms, hospital operation rooms, and hot and humid locations such as bath rooms and wet sauna rooms. IP64 Dust/Water Protection. Operating Temperature: -20ºC to +60ºC. 3W RMS Power in 100V line. 7,7 cm speaker. Frequency Response: 150 Hz - 20 kHz. Sensitivity: 87 dB (1 W, 1 m). Weight: 700 g. Grille diameter: 139 mm. Depth: 94.5 mm. Flush hole: 100 mm.