The semi-circular BOLLA BL-119 surface-mounted 6-inch ceiling speaker is used for public broadcasting background music in restaurants, hotels, factories, shopping centers, and supermarkets. 5.25 loudspeakers Rated power and voltage: 100V and 10W, respectively Reaction: 130–18 kHz 90 dB is the sensitivity. External dimensions (WLH) External dimensions: 195 x 55 mm