Bosch LBC3090/31 Ceiling loudspeaker 6W metal with clamps, integrated circular metal, grille, two spring-loaded clamps for ceiling mounting, protective dust cover, two-way screw terminal block, white RAL 9010, Maximum power 9W, Rated power 6 / 3 / 1.5 W, Sound pressure level at 6 W / 1 W (1 kHz, 1 m) : 99 dB / 91 dB (SPL), Sound pressure level at 6 W / 1 W (4 kHz, 1 m) : 104 dB / 96 dB (SPL), Effective frequency range (-10 dB) : 70 Hz to 18 kHz Opening angle at 1 kHz/4 kHz (-6 dB) : 160° / 55°, Rated voltage 100 V.