Does power: 5 w / 10 w; Does constant pressure input: 70 v to 100 v; Does frequency response: 100 hz to 15 KHZ. Does the sensitivity: 93 + / - 3 dB; Does the ceiling openings: Φ 205 mm; Does decorative cap size: Φ 228 * 90 mm; Does the installation forms: type suction a top; Does adornment material: ABS; Does weight: 1 kg; Does the speaker unit specification: 8 "* 1;